As a layman personally, for me, the Trent arm-strength issue was dealt with in the Miami game. After he tossed that bomb to Evans for a 70+ yard TD, I thought to myself "Well, that's certainly not a noodle arm."
J.P. does have an exceptionally strong arm, however, he looked like he was underthrowing some balls last year on long routes (Evans in the Jets game, for example).
I am looking forward to what Edwards will bring to the table this year.