It would make me a lot less nervous about yet-undiscovered issues affecting everyone's playing experience, but doing that with a bugfix mod introduces a different problem: there's still no way for me, the mod-maker, to update the mod without going back to the situation that exists now where only a handful of people have the 'new' version, and it doesn't get used. Now presumably there won't be that many fixable bugs left in Demigod after the next Uberfix release, but if there is an actual problem caused by the patch-released version of the mod, there's nothing I can really do about it, and I just have to hope people will be more willing to put up with that issue than with those that the mod fixes.
If the next release of the UberFix is used in a tournament and proves more or less stable, I would definitely have no real reservations about doing this. The kinds of bugs I'm finding at this point are few and far between, and so obscure that if they have to go un-fixed, then oh well.
There's a completely different problem that tends to occur when doing this with a balance-type mod: it can actually worsen the existing fracturing of the community over mods. You'd get a scenario where instead of 5-10% of multiplayer games being hosted with mods and the rest 'pure', you'd have a bunch of people hosting games with the patch-provided mods, making it difficult for the people who don't want to play with those mods to find a game.
This is less of a problem with a big, thriving multiplayer community, but as with DG where there are 2-3 games forming in US primetime, having half or more of those 'undesirable' to a given player because of a balance mod or lack thereof is something of an issue. Of course there are people who are willing to play in both game types or who don't know the difference, but the majority always tend to have a strong preference one way or another.
In the case of really important exploit/bug-fixing issues, I'm all for having it included in a patch so everyone has to use it, I'd just prefer it to be looked over and tested by a publisher/developer if it's gonna be using my code.