Wait, you want to kill the 13" Pro and doom those of us who don't want an MBA but don't want a larger than 15" computer to the frikkin MB just cause you object that they called it a Pro?!!!!!!
So what it's not what you consider a Pro, it's still a helluva lot better than the MB solely for nothing else a much better case design (no frikkin cracking plastic, better color for framing a screen with, hell, better color overall, white sux, slightly thinner, one extra input port, light-up keyboard which is just nice aesthetically).
Now if you want to propose they just take off the Pro in the name I wouldn't object (I don't care what it's called, it's just a name), but it sounds like you want them to get rid of it solely cause you object to them calling it a Pro.
First and foremost, chill the fu*k out! I, personally don't want to kill anything in Apple's lineup, least of all the 13" MacBook Pro, which is actually my favorite of the current shipping Macs next to the 27" iMac.
Secondly, I'm suggesting that it may be a prudent call on Apple's part, especially if they can keep lowering the cost of the 15" MacBook Pro as they've gradually been doing and if otherwise, the 13" Air is comparably fast, and if the white MacBook shares virtually the same main logic board (and therefore chipset, processor, RAM type, etc.) as the 13" Pro; with little exception, it's pretty much the same computer! Those who go with the 13" MacBook Pro, fall into one of two camps, they either don't know or care about the technical difference between it and the white MacBook, or they use it as a power user, and thusly care about the specs. Compare the white MacBook to it, you're missing out on a FireWire 800 port (which, I agree, should be there) an (unused) IR sensor, and a backlit keyboard that is more of a luxury than a useful feature and an SD card (which I'd bank will be included in the white MacBook before too long). That's it! Arguing that the 13" Pro should stick around solely because it is a more aesthetically pleasing computer sounds about as silly of an argument as the argument for a black MacBook was over a white one at the time; $50-150 (depending on the rev.) for the same machine in black. Unless you have the kind of money to blow on aesthetics.
Plus, I don't know if you've had much hands-on time with the unibody polycarbonate MacBooks, but, while they be made of the "weaker" material, they DO take more dings and scratches than the aluminum. They don't crack like the 2006-to-Mid-2009 MacBooks did unless you go out of your way to try to put a crack in it.
Anyway, it's just a theory. Way more of the 13" MacBook Pro's target market audience are going to have beef with the continued use of the Core 2 Duo (the switch from GeForce 320M to Intel graphics that may or, more likely, may not be comparable, if not better) than the target market audience of the MacBook Air, white MacBook, and Mac mini computers will and if the 13" MacBook Pro is more or less the same computer, then either beef up the 13" MBP to be more like its older siblings (i.e. don't give them the same IGP or GPU as the MacBook, MacBook Air, or Mac mini) or kill it and close the gap by lowering the price of the 15" MacBook Pro while giving the white MacBook the FireWire Port and SD card slot. I see NOTHING wrong with that scenario.