I think we can all agree that tier sets for pve and pvp were the best version of BP.
They were subtle yet impactful and didnt feel like your class was gutted at teh start of the next expan.
I think BLIZZ just used BP from Legion forward as a way for “infinite” progression via artifact power. They gimped this in SL as renown has a more clear cap but the time gate is still there.
Just pray they learned their lesson and just go back to simply armor sets, trinkets, and occasional legendaries as the only source of BP.