The problem is DPS. VKF gives daggers more of a boost than the 10~15% from CM+1 due to DS+30% and RP+20. STR/Brutal over DEX/SWTE greatly reduces doubleshot (~40% loss). You're trading DS+70% RP+20 for DMG+20~30%, landing the build well below classic VKF thrower.
IMHO, changing to DEX-based, but keeping Brutal should be a very large net win, but I don't think it will make up the difference versus VKF.
VERY rough DPS rankings for ranged are about like this.
- VKF T.Dagger @ 40%
- Repeater @ 60% (zero EF)
- Shuriken @ 80%
- Repeater @ 100% (infinite EF)
I didn't put INQ in the list because (IMHO), the imbue-threat bug makes it unacceptable for raiding. IIRC, it's between VKF & zero-EF Repeater. 'Dunno where Bow lands. Below VKF?
BTW, this doesn't make your build unplayable for questing or raiding. A top ranged build is incredibly strong -- strong enough to nearly carry a raid @ R1 and lower. I'm just adding some context for how raid-focus builds see the "doesn't suck" part of the OP title.