In sum:

1. Kaaya is not a running threat and his footwork is suspect and hence the QB RPO where QB runs is not an option
2. Kaaya has been coached in Cali to look like an NFL QB and has had success out of SG

Conclusion

Line him up at SG (much like Coley did with arguably BETTER success than present) and have him sling it to multiple WR who by nature will spread the 7 man fronts he has faired poorly against.

Think of mathematics. In order to get to the next level you have to know how to add and subtract which are the basic fundamentals. The same is true with your run or pass game, U have levels and you have to win early on the first level to have consistent success while moving on to the next level. See the thread which discusses Splits which breaks down the most basic techniques, concepts and principles that are often ignored when troubleshooting your offense. Fine tune that area and correct the little things that you are doing wrong first. And then you will begin to notice a better performance in the offense's run and pass game. Point here, is if U can't consistently get off the first level; the odds are you will struggle moving on to the following levels.

Result: Ur offense is constantly trying to catch back up. Therefore, U have late throws, RB running into the back of OL, TE\WR\RB drops because QB was hurried therefore the pass lacked touch, CB\S's reading routes early therefore breaking on balls early, interceptions, WR\TE\RB not getting open in time, etc.