#1 ms account forced (unless doing obscure stuff to 99.9% of users during pre-install phase)
#2 nobody thought it's a big change.. really
#3 vbs enabled by default.
#4 of course unnecessary gui changes and breaking changes means lose in productivity. taskbar and start menu are 2 of the 4 basic gui tools that should not break/lose features (the other 2 are desktop and file system explorar)
#5 of course it does: useless tpm and other unnecessary hardware requirements for the os. perfectly fine hardware used as a terminal are broken/unsupported to artificial changes. and you should knwo that pop-count usage may be slower on older hardware than c optimized implementation of same intrinsics function. also nobody asked and needs bitlocket to be on by default (another slowdown regarding all devices)
bonus
6# personal usage scenarios: bitlocker is a pain for those upgrading cpu/hardware (who the hell keeps/remember where it was the decryption key?)
you shoudl stop using windows insider telemetry as data to make decisions about what features to remove.. you should use it instead to put things on the TODO list for bugs. Windows insiders are NOT at all the 2% of windows users, they are less (and using the 2% rule ti means you should just ignore it), they are mostly faboys not involved in production, development or work usage, at least 99.5% of them.. those 0.5% of 2% are just devs wanting to test early-early-early preview stuffs when there is some kind of framework/sdk/driver support, but that's all.