... but speaking of Igoudala, I've read that he is doubtful to be in the Game 4, I think it is a chance for Houston to follow up,
Yes Andre Igoudala is listed as doubtful to play on their next game due to his knee soreness that came from the collission of his knees to James Harden last Game 3.
But again, I see it will not be a problem. Kevon Looney, Nick Young and Shaun Livingston are those I think will replaced Igoudala as starters. But since Livingston is way better as 6th man, I think it will between Looney and Young or Kerr can adjust it by placing Draymond Green as forward as take Pachulia as center. I maybe wrong here depends on Steve Kerr's preferences so don't take it seriously.

And for recap, Andre Igoudala only have 26 total points from Game 1 to 3 (on which only 5 at Game 2) so in terms of production, I think it will not harmed much the Golden State Warriors offense although at some point, no doubt that Igoudala is really good at creating offensive phase for an easy bucket.
Even he doesnt have much contribution to points but he do have purpose on making out offensive phase same as you said but i do believe that Looney would really replace him. The thing i do like on GSW that they do have lots of shooters or do have extensive roles into each player which if a certain team would play against them, they would really have a hard time on making strategies due to that kind of advantage where any positions of each player theres always a tendency to make points unlike on a single role player which is easy to read on.