well, the reward for TBL is acceptable in my opinion, its random and can get up to 1000 attribute points… The only problem i can see that scares ppl out are oppressive one-shot-tank meta builds(that may or may not die after Re:Build).
An instance that gives you flat itens with no attributes seems a fun way to give some space for skills, but thats a thing i know a LOT of ppl will hate over sinse they grinded the hell out for equips just to crush everyone and try to become the one army man.