As for Kenders specifically, I've never played Dragonlance and never see a kender PC before, therefore I'm not "fed up" with them yet. I actually find the current Kender very interesting as a PC, and I'd be willing to allow it even in another setting. Do I understand right that people have issues with Kenders because they steal stuff from other PCs? Because this I would never allow in my game! I have learned a long time ago that "no attacking or stealing from fellow party member" is the best house rule you can enforce in your game! But as a matter of fact, the current Kender description doesn't say that Kenders steal from others, just that they pick up random objects along the way. You can easily allow their "Kender Pockets" ability without ever having to worry about how they came up with those items, and without ever making specific items disappear first.
Kender, as presented in the original Dragonlance, did not
just steal from other PCs, they'd steal from anyone. NPCs tend to react angrily to being "robbed". Even if the other PCs are talking to them, trying to make deals or otherwise acting in a sane manner. Outright banning kender from entering the castle or your house seems perfectly sensible.
If you had a player, playing a rogue, who kept stealing stuff, getting caught sometimes, getting tossed into jail and maybe getting the rest of the PCs in trouble, at some point (hopefully soon!) either the DM will tell the player to stop being a jerk, or the other PCs will ensure they don't do it again.
That doesn't work with an original kender though, as they're "playing their character" which actually required this, and telling them not to do that doesn't work (it's unconscious theft that the kender has no control over), and even threatening doesn't work (original kender are outright immune to fear).
The good news is the new kender isn't strictly required to do that kind of nonsense, but that stuff in the pockets has to come from somewhere... Someone with no familiarity with original kender probably isn't going to worry about that, but someone familiar with the old klepto kender would.