I'm not sure I understand what you are asking for here.
Isaiah is already averaging 6.8 assists per game (7.5 per 36) -- that's 9th in the NBA (as is the per 36 number).
He's assisting 34.6% of his teammate's shots on the floor -- that's 12th, but essentially tied with everyone from 8th through 13th.
Also note that he's posting those numbers on a team that is ranked 21st in FG% -- he doesn't get credit for an assist if the shot is missed.
He's very much acting as a facilitator. He's not doing so at the extreme levels of guys like Rondo or Paul or Westbrook, who are basically assisting half of all their teammate's shots. But he's right up their with all the leading 'facilitators'.
Only two guys in the entire league are averaging over 10 assists per game and both of them (Rondo, Westbrook) dominate the ball FAR more than Isaiah does. Is that what you are asking for?
If you look at the leaderboard for facilitators (players with at least 5 assists per game), of the 5 players who score more points per 36 than Isaiah, only one of them (Westbrook) deals out more assists per 36. I think he's doing all right.
Of late, it does seem to me that he tries to 'pass first' through the first half of a game, getting his teammates going first and then only seems to start taking more shots himself as the game progresses. Last night was a good example of that, but that seems to be the pattern for the last couple of months.