At this point, and this is not a studied opinion at all, I'd rather them find a way to make it a quicker ruling, because some times the call is simply (and obviously) wrong and ought to be reversed upon further review. Tis a conundrum.
Supposedly, the NFL is considering moving all replays to the NFL offices in NYC; in theory that should quicken the reply process.
And I have to agree with Bill Belicheat; ALL plays (especially the ridiculous PI calls) should be reviewable.