Thr trials players are gonna play no matter what. The guys doing carries might be out of a job (?). The average player is probably not going to have fun bc its not a fun game mode. so they might not even play bc they dont care about the adept weapons except if they are good for pve - adept big ones is pretty useful. Then they will get something good enough and bounce.
I predict it will be like the last useful change- surge of players week 1 then fall off quickly thereafter. Back down to “normal” after a month or so.