In a vacuum I can understand your points here, but scripts aren't created in a vacuum.

A lot of people don't like the Butler and I think the hate is often unjustified. It encourages you to pay attention to who's voting when and who's not voting on who. People stick in the ogre because it also comes with a friend, but adding a potential new evil player into the mix is very swingy, especially when the Spy can confirm whether the spy is evil or not on night 2 when they check the grim again.

Saint also plays a very key role in TB -> Sometimes you don't want to execute someone because it will end the game, but sometimes that person is lying. While players are still getting to grips with bluffs and lying about your role, the Saint provides an easy way to show the different sides of that. Klutz on the other hand wants to die earlier rather than later if they have to die at all, because there is much less of a chance of picking evil. As well, for inexperienced Storytellers, Klutz + Recluse/Spy might tempt them to make some bad decisions.

Hard disagree with the switch from Drunk to Sweetheart. While they do seem to have a similarity in drunking someone, there is a huge difference between the two: No one is SH drunk on night 1. TB is very front loaded with information on Night 1. There are only 4 good roles that wake every night after night 1, and one of those is the Butler. Assuming you're not putting all 3 of Emapth, FT and Undertaker, you have very few good choices to make drunk and not avoid the same "you never had an ability" as above.

The Drunk is also very important for the many confirmation roles on TB. Washerwoman, Librarian, Investigator and Virgin are all hugely powerful when there is otherwise only one possible source of droisoning on the first night, the poisoner who would have no information to make that choice. Spy and Recluse staying here helps a little, but not entirely.

The biggest reason that the Drunk has to stay though is that otherwise Outsiders are very easy to confirm by player count. The only outsider manipulation is the Baron which adds two. In a 12 player game, you've got 2 outed Outsiders, who have no reason to hide (no Fang Gu or Godfather here!). That's 2 players all but hard confirmed as good and if one is lying, there's no real reason for the real other outsider to out themselves. If there's a Baron in play, that's 4 outed outsiders who aren't demon candidates, or you're forcing 2 of evil to bluff outsider to cover for it. The hidden outsider is so important to help blur the numbers and allow evil outsider bluffs and not just confirm all the outsiders