It makes sense to me. These SoCs are using all the same components as M1, just more of them. The only components (that I noticed) that are truly new are the extra image processing cores for ProRes video. Otherwise, it’s the same CPU and GPU cores (but more of them) an additional Thunderbolt port and more RAM.
On the other hand, that’s exactly the difference between the A12, A12X and A12Z so who knows, but it definitely should not be called M2. I’m expecting that name for when they upgrade the cores themselves.
The lower-end laptops (using M1 SoCs) were announced earlier this year. I wouldn’t expect them to get upgraded until after the rest of the product line goes ARM (meaning iMac Pro and Mac Pro - hopefully we’ll see them in a few months).
But with the re-introduction of MagSafe, you don’t need to give up a port in order to connect to the charger. (Yes, I’m aware that there are docking stations and displays that will deliver power while moving data on one port.)
The 16" model has gotten slightly thicker (0.66" vs 0.64" on the Intel 16" model).
The 14" model is the same thickness as the previous 13" models (0.61"), but is slightly thicker than the 2016 model (0.59").
It should just work. USB Power Delivery protocol allows devices to negotiate with chargers to determine the voltage and current levels supported. If the devices can’t negotiate, it will default to 5v, which will charge a phone just fine.
As for current, that’s not how electricity works. You can’t force more current into a device than its circuitry is capable of drawing. (Well, you could do it by increasing the voltage above the phone’s maximum, but that would cause damage all by itself.) The phone will attempt to draw what it wants (either its maximum, or some reduced value based on the optimized battery charging circuitry), and the charger will limit that to its own maximum.
So, if your phone can draw 20W and you plug it into a 95W charger, it will simply draw 20W.