The TB3 USB-C ports on the MBP are the most versatile and powerful ports on any consumer electronics device...and there are four of them. No castration going on there.
Lightning just needs EOLing. It's now an uncomfortable standards clash in the Apple product ecosystem.
I was more referencing removing the good keyboard and the SD card slot than the USB ports specifically, though in the short-term switching exclusively to USB-C is a giant pain in the ass. I guess USB-C is the future, and that's cool, but I think the MBP should accommodate professional use without having too many dongles.
So it really should have a SD card slot, and it really should have at least one or two older USB ports along with the four new USB-C ports (and maybe in the next-gen they can replace the older ports with even more USB-C), otherwise people who work on the go are going to have to carry all that shit around with their laptop (thus mitigating the space saving removals), or simply look elsewhere for their computers.
Personally, I wouldn't miss the SD card slot, and I use the USB ports on my MacBook Pro once in a blue moon. In fact, I was actually considering the 12 inch MacBook because I didn't care about either of those things (despite empathising with those who do). However, the killer for me was the butterfly keyboard, just as I guess the killer for a photographer or video editor may be the removal of the SD slot, and the artist who uses a drawing tablet the USB removal. It just feels like a sacrifice too far in the name of thinness, and kind of kills the appeal of the device in the short-term, at least.
In short, I think Apple has kind of forgotten what a "Pro" device is supposed to be. My view of Apple stuff was always that thinness came second to elegance and professional use-cases on their Pro devices, whereas devices like the MacBook were the ones that combined elegance and portability/thinness/lightness. I just don't think they've gotten their priorities right here, and (in the case of USB-C specifically) have possibly skipped a transitionary generation that mixed the old with the new.
At any rate, my complaints are purely academic at this point. I have some amazing Apple machines that I'm very happy with. By time I'm upgrading they may have seen sense with the crappy keyboards, or significantly improved them. And if they haven't, I'll just have to untangle myself from Apple's ecosystem if I don't want to make the compromise.