I believe me and a lot of other people also want this change as for the blocks here is 2 that I think are gonna be most useful, observer, fence gates. Not to mention what's the point of updating version if you dont add more blocks.
If you collect a list of a bunch of blocks and post them here, I'll curate it
And for your other question, "what's the point of updating if you don't add more blocks?": we agreed to keep TW & WZ up to date with the latest MC release, MW is usually a bit delayed since its less of a prio for me
I might just add all of them until Christmas time is over (no not sand dispensers)
bedrock seems like a good option. Seriously, in my mind any of honey blocks, target blocks, obsevers, comperators, terracotta, note blocks and glass seem great. Scaffolding also is interesting.
Ye building blocks with the disadvantage that all break once one gets shot
comparators and observers would be cool. im pretty sure the main argument against comparators is that one auto cannon but id argue its easier to build with torches anyways