I mean I don't think they will do it, it's just I wonder what would be worst. But I think apart from certain Thor fans who wants things back to the way they were or fans of the classic comic format, I don't think most want the old Loki back. Loki wasn't exactly a popular character and he was very one-dimensional on top of that. It wasn't until Kid-Loki that Loki started to gain popularity and of course the movies help as well but not all movie fans are comic book fans though.
If we are going by writers though, Loki is sort of like a gold mine now for writers because you can literally do anything with his character and it won't look out of place. You can have drama with Loki, tragedy with Loki, comedy with Loki etc. etc. etc. You can put in him the avengers but you can also put him in Squirrel girl. There are just so many possibilities that writers can do with Loki now that they couldn't do with evil Loki and wouldn't be able to do if they revert him back.