Key to any flatter pattern is to limit the amount of out angle in your release.  That is why lower axis rotation releases work better.  What kills house shot bowlers the most is that their comfort zone typically has them sending the ball wide out to a break point well outside 2nd arrow.  Result is lots of 2-10 combinations and washouts.  Then when they try to square up they are through the beak or Brooklyn.  They end up going away talking about a reverse block when in actuality they are simply trying to cover way too many boards of out angle."

I would say straighter is better -- Weak equipment with not that much movement on the back would be perfect but you will have to make adjustment.  Speed, angle and etc but those are small compared to using hook monsters..