Just being honest.
Have you considered that the people who are likely to have no issue with the restrictions might simply be less vocal about their acceptance or enjoyment of them? Isn't it something of a known aphorism that people are generally more prone to complaining than praise?
May I remind you that I do have two powergamers at my table? I know they'd just love the number porn of getting those +Xs to hit, damage, and AC.
Lord knows I am, but, again, I have a couple powergamers at my table. One of them takes a self-confessed joy in trying to find broken class combinations (a habit he picked up when he played 3e). I'm sure he probably misses it.
I don't see the halfling ban as being all that impressive. I've just replaced them with human little people. That way I don't have to worry about changing the sizing too much. Plus, it creates some more diversity among the humans in the world.
When it's setting appropriate I do limit classes based on race. In my Tenesia setting, Dwarves can't be bards, sorcerers, warlocks, or wizards. They REALLY offended the goddess of magic, and she stripped them of the ability to cast arcane spells. They can still craft magic items using a kind of runic magic, but no arcane spells.
Only the Darve can be crystal mages (a kind of wizard who stores spells in crystals and uses special crystals to alter or augment their spells).
Only humans can be mage-hunters (a kind of paladin that specializes in resisting and dispelling arcane magic and slaying arcane spellcasters).
Also in that setting, you can't raise the dead without a humanoid sacrifice. The gods are greedy for souls, and you have to give someone if you expect to take someone back. That said, elves in that setting just flat out can't be raised. They're more like fey than regular elves, and their souls go back to nature when they die (bringing one back from the dead would be like pouring a glass of water in the ocean and trying to take back just the water that was in the glass).
Wow, now that one is absolutely cool. XP for that. and see this is how to introduce dwarven wizards not the retcon them into every and all as if they were always there method.