While I cannot give a complete answer to your post, as I am not sure of your layout design, size of the forms... etc... One thing I can say with certainty (having both an iPad 3 and an iPad Air) the iPad 3 runs more complex solutions "extremely" poorly. On the other hand the iPad Air is an absolute game changer, solutions which I thought were completely unusable on an iPad 3, ran beautifully on an iPad Air. I use a lot of Conditional Formatting and Script Parameters that often evaluate a lot of information, the iPad 3 would take an enormous amount of time to process the Parameter. This delay could lead one to believe the Script was not functioning. On the iPad Air the delay is almost non-existent.