The 'Air' name has too much goodwill, that's almost certainly why the October 2018 machine was called thus and not the 13" MacBook - more likely would be the 12"MB being rolled into the Air line (it was effectively the replacement for the 11" Air) add a 128GB version for $999 and the old Air can finally be retired. I would like to see a 15" MacBook based on the Pro but using something like an i7-8559U (Iris rather than Radeon graphics) for around the $1,500-$1,700 mark.
I know folks love the Air, but since the new Macbook came out, a lot of folks (myself included) have wondered, "Why have both?" I'm just wondering at what point they'll make a Macbook that does just the trick for everyone who wants a Mac but only uses one for internet, email, photos, etc. I used to work for Apple Retail, and it seemed like most people needed only the "basics." A low-level Macbook was all most people needed (I left in 2011). At some point, the "Air" becomes superfluous, IMO. Or, they keep the "Air." My point is that I see them rolling Air and Macbook into one line (as you suggested, just in reverse). This would certainly simplify things, and I hope they do it.
This sounds insanely accurate.
Thanks. I think it might be a good move for them, actually. Keep the low-tiered Macbook (or Macbook Air, just not both), start at a price that is reasonable, but add upgrade options (including screen size) for folks who need a boost (or larger screen) but don't need legitimately "Pro level" computing power. They have shown us with the new Mac Pro that they are serious about making workstation-level machines for "Pros." I can only surmise much of what they presented was in response to the mistakes they made (and criticisms they received) with the Trashcan. I can also guess they are planning to do the same thing for the Macbook Pro... make it a legit "Pro" machine. It'll cost an arm and a leg, but no one will be able to say, "the MBP is a mid-level system between the MacBook And the older MacBook Pro's." (see quote below). As for screen size, and this is anecdotal, based on my experience at Apple Retail, I cannot tell you how many 15" MBPs we sold to people who didn't need the horsepower. They just wanted the bigger screen. I absolutely think they could sell a ton of scaled down Macbooks (or Macbook Airs, whatever they decide to call them) with larger screens. To the folks who don't need to run 128 tracks in Logic. No, that's where the new MBP would come in. All speculation on my part, but just going off my experience with working there, as well as an observation that Apple likes to keep its reputation as an "elite" brand intact. They've suffered amongst pros in the last several years, and they are looking to rectify that.
Nope!
The current MacBook Pro's are a mid-level system between the MacBook And the older MacBook Pro's. This is a market that was not buying the newer MacBook's as they saw them as too low end (which they where).
Sadly, the more advanced amateurs and mobile pro's where left in the winds. The retina MacBook Pro systems where too limiting! Compared to the older MacBook Pro Unibody 2012 and older which offered serviceable RAM & Storage.
While Apple did put some effort into increasing the RAM & Storage in the later models, RAM was soldered and the single custom flash drive which Apple wouldn't upgrade after purchase (you had to go with 3rd parties). And dual drive support was just not possible!
A Pro's Pro is desperately needed! Offering the a less constrained CPU thermally, Serviceable RAM and Storage, And bringing back USB-A ports (2) and still offer the four USB-C ports. Modify the back two USB-C ports so a MagSafe adapter plug can be flush mounted so we get MagSafe back! On board Ethernet and SD slot. Pro's don't want dongles or clip on hubs! And they get lost too!
The New Mac Pro is a sign Apple is starting to swing the pendulum back to Function over Form! Now we need a mobile system to go with it! The 16/17" model I suspect is the one! I hope so.
Totally agree with you on the MBPs being "mid-tiered" and advanced amateurs and pros being left out. See my above comments where I flesh out a bit more detail on where I think they may but going.
In response to your proposed MBP (a "Pro's Pro"), I think you may be reaaaaaally darn close, if not nail-on-the-head accurate. The new MP is the tower version of what you're describing. For serious, workstation-level laptop computing, they really need to produce something like what you described to scratch that itch for folks who need it in portable form. For everyone else, we won't need it (or be able to afford it). Personally, as a professional musician, I can use a lot of horsepower for running Logic or Ableton, but I get by just fine on my maxed out Mid-2014 15" MBP. Point being, if I had the option of buying a tricked-out 15" Macbook (Air) that would get me by for say, $3k, I'd do that. But if I could get a New MBP (the one you're describing) for another grand, I'd do that. Especially since I tend to keep my machines for 5-7 years. It'd be nice to have all the options you describe.
They won’t kill the Air name. It’s too well-loved, and if they were gonna do it, the time was last year (just call the 2018 air a 13” MacBook).
Can’t see the MacBook starting at $1,000. Apple’s prices are all going up, not down. I think they’re done with the days of the $1,000 laptop. Hope I’m wrong.
MacBook Pro was JUST updated. Still has “new” badges on apple’s site.
You may be right on the Air name (see my comments above). I've thought about the starting price... I think you may be right on that, too. I'd guess an $1199 starting point if you are. I don't think it would be smart on their end to start at that point, as they'd price out a lot of college kids, but I can certainly see them doing it.
Gosh, this is a long post. Sorry, everyone, but since leaving Apple, I don't have anyone to geek out with over all these things.

Thanks for dialoging.