I just think it is probably fairly closer to a wash, but with the additional experience and time in the system the whole crew might be much improved. However I also think that Collie and Pau'u may be a bit better than they were given credit for and may have shown that better if Wilson had been QB longer than just the last half. But you're right - if Romney lives up to be the star we hope he is this year then I may end up completely and happily wrong.
In any case, I expect their production year over year to be significantly better regardless of the skill level, for obvious reasons.