I have to agree. It honestly takes a bit of study to figure out how to differentiate these products. The differences seem kind of arbitrary (e.g., the current Air has the weaker display and hard disk at entry level, but has a superior selection of (now "legacy") ports that I use daily when compared to even the spec'ed up MB or MBP.) Then there's the matter of the keyboard on the new MB and MBP, but the more comfortable keyboard on the Air.
I'm beginning to think about replacing my 2013 MBP, and I haven't a clue which machine I should be looking at.
One of the main reasons for the screwed up line is a mis-prioritization on thinness and weight. Honestly, and I know I'm being a bit facetious here but it's rooted in 100% earnest opinion: If Apple came out with these 3 levels of macbooks, I think the line would make a lot more sense:
MacBook Pro: Most powerful MacBook. Power over thinness & lightness. 2-3 USB-C, magsafe, and a "real" keyboard and "real" non-forcetouch trackpad and real function keys PLUS touchscreen. Retina display. Replaceable RAM/SSD/processor/battery.
Most expensive.
MacBook: lightest of the light macbooks and all about portability 1st over power. Thinness over power. Just 2-3 USB-C ports, and the thinnest keyboard, forcetouch trackpad possible, with soldered-on RAM/SSD/everything. Retina display. Real function keys or touchbar, I don't know what people who want the smallest/lightest laptop possible would prefer. Middle-range cost; less than MBP, more than MBA.
MacBook Air (or new name, since MacBook would take the "airy" light spot): Flexible functionality first over weight & thinness & power. Not as powerful as MacBook Pro. Retina screen would be nice but not necessary (this *is* a 11" & 13" screen on a *laptop* after all, where portability is more than size/weight and also about ability to stay powered-up long w/o plugging in as well as be easy to connect to & use w/o having to carry a sack o' dongles...) to keep the cost down, 2 USB-C, 1 USB-3.0, magsafe, headphone/microphone jack, function keys, displayport port, SD card slot, replaceable RAM/SSD/processor/battery. "Real" keyboard & real trackpad. Not as light as a MacBook but the flexibility more than makes up for it.
Instead we're stuck with Apple focusing on reducing, thinning, simplifying, and eliminating first instead of power & function/flexibility, resulting in a complete mishmash.
Hey Timmy & J-Ive - Problem solved, free of charge!