I have used literally EVERY text tweak in Cydia and while some have a lot of potential, none of them are as well integrated into iOS as BiteSMS. All of the other ones just seem clunky and not super well thought out. BiteSMS is the main reason I jailbreak actually.
Every build of it I find to perform better than the previous. Which is why I don't mind paying for it. Martin is all about making it the best he possibly can and constantly working on ways to improve it. Since the iOS 6 jailbreak has come out, he has pushed out BiteSMS 7.1, 7.2, 7.3 and most recently 7.4, all in less than a month.
And as far as the other features that u don't have any use for or "bloat" as u are referring to it as, if u have no use for them then u don't have to use them. They won't affect u if u don't use them.