Yah, I've been using the Unofficial Patches almost since the beginning. Between mod dependencies and definite bugfixes, I find them far too useful to not have.
But I also understand some disagreements with them too. Some changes are very much judgement calls of "Is this a bug or oversight, or was it meant to be this way?" that reasonable people can disagree over.* I wouldn't be surprised if on some bug fixes, reasonable people can disagree over whether the implementation was right. And though I'm running a current version of SE with no plans to downgrade, I do wish they'd kept a "last old version, unsupported" of the SE patch visible for downgraders -- though I can also understand why they don't.
* Like NPCs whose stats don't match their gear and abilities. Many of them are genuine oversights where the devs never got around to setting them properly. But some are likely deliberate, given the NPC's characterization and backstory. And some could be reasonably argued either way.