It appears there is more friction in the outhaul system then there could be - the blue line is too thick and that's leading to some binding in the fairlead at the clew end of the boom. The 12 strand line also appears to be a bit thick as well, and most likely not running as free as it could thru the small deck block at the base of the mast. If it were me, I would downsize both of those lines, and use dyneema for the line running thru the boom fairlead. Dyneema will run with less friction then dacron or nylon
Clew cringle 9 inch from boom end fairlead, any more it's a circus tent
Ah, I'm not personally a fan of those particular webbing tie downs, I found once the other controls are banged on it resisted. So I made my own.
it looks to me like your using your primary line for control, and you control line as primary, swap them round and you should notice a differance.
At present it looks like your using the line that should loop through the eye at the end of the boom (the plain white one) to actually grab onto in teh cock pit, the one you currently have at teh end of teh boom (purple) should come down to the cockpit,
in fact it look like all your ropes are pretty high friction types, get some vectran for running through the bloccks, i think mmost of what i've sai has allready been covered anyway...