Yes I kinda agree with what you're saying, but Tekkit 4 is just missing some of the mods I really like and that's why I'm not going to use it: simple.
I really do hope IC2 and RP get updated so they can be added to the new Tekkit. But I am always going to miss railcraft.
By updating/working on Tekkit Lite I mean just, for now, fixing bugs, changing configs, adding a few new mods, and such. But what other people are saying is true, that Tekkit Lite was an experiment and Tekkit 4 is basically Tekkit Lite. But since to Redpower, IC2, forestry, railcraft and such I don't really like it. It's kinds the modders fault.
Modding API? Independent of Versions? NO MORE IDS? OHHHHH YEAAAH i've been waiting for this forever.