As a M+ player, I was thrilled to see the removal of Tier-Sets in BFA, however, Ion has said in an Interview that Tier-Sets will return in a later patch of SL. He hasn't specified if they will be raid exclusive but I still remember back in Legion that Raid-Sets were so OP in m+ you had to farm them, even if it was just the normal raid version.
I hope they will make a M+ version of sets this time, otherwise I see very dark times ahead for their player-base if everyone is forced to raid to be competitive in M+.
Please be civil about this topic, respect the opinion of others.