If the ad gets disapproved, then to get it up again , you gotta edit and change something, and if you do.. the ad's performance history goes to hell according to many people..?
Well, yes... if you change an ad - then it does lose it's history. Not sure I'd categorize that as its performance "going to hell"... it's simply a new ad.
That said, if the change isn't significant, it'll likely continue to be viewed as poor... which is why it was disapproved to begin with.
If this Ad is not approved then any performance history it has is irrelevant - it will not show again.
If you change the Ad so it is approved then it is a different Ad and therefore it has no performance history.
I'm not aware of any reasons for disapproving Ads that could be resolved by changing the target page only. If such circumstances doexist thenI guess it is conceivable that any performance history may remain.
What do you belive the Performance histroy will do for (or against) you?