Ranged marksman is significantly weak later on

It's sad that class based on range combat is only viable in melee in endgame (and by endgame i mean even basic 100corr monos lol).

I enjoyed multishot+flurry in campaign so much but it lost its breath on monoliths very quickly.

Flurry, unlike other basic abilities, is too weak to take down bosses and somehow works against them only with shotgun multishot (and try that on small hitbox enemies like Lagon tentacles) which makes it totally useless against long range enemies (marksman which sucks on range distance).

Why not make the shotgun node without the 80% penalty? So it would be usable even in range combat? Would it be really that op? Or significantly boost flurry against single targets? For ex rive or fireball or lightning blast are decent single target abilities yet flurry sux hard compared to them.

I just need to vent that my favorite build is yet again useless in endgame. All the charts showing marksman as quite popular but its only because melee detonating arrow with blast knife... Real ranged marksman is on the forge guard level (aka in need of rework), which is sadge.