Because this is Apple we're talking about, I'm at the same time excited and scared when it comes to the coming redesign. It will very likely look cooler and be more portable, but they might also cut some really nice features they deem unnecessary. I'm really fearing that the coming 15" (or 16") will have less ports than the current one, and I as a power user really need my ports!
Eh, a lot of devices are wireless now. New OSX is much more fuel efficient + better battery + more fuel efficient CPUs = less need to be plugged in all the time.
I think it's an easy decision - x3 USB-C on the 16" (i.e. 15") and x2 USB-C on the 14" (i.e. 13"). MagSafe retired. MacBook "Air" range also gracefully retired.
This would give evolutionary consistency and design continuity with previous models.
If you're really that much of a "power user" (most of the folks I meet who say this aren't really), maybe a laptop isn't really what you should be doing? I work with high performance computing clusters so I know a fair bit about performance. I would guess that only about 1% or 2% of MacBook Pro customers consistently red-line their machines (weird types who need to be doing CPU intensive stuff locally and need to do it on the road). I'm happy to burst as needed, see my code compile faster and enjoy the snappiness.