That's like not liking a band once they make the big time. "I liked tribute stores
before it was cool to like them!"
I love them as someone who lives a flight away and just goes for HHN and in 2019 went to my first Mardis Gras and LOVED the shop. If you live in Orlando with an AP and go a few times a week, I guess you could get sick of the stores (though you're going back for the same rides, food, stores, etc every time so why the super cool themed stores are a bother is hard to understand). But as an out of towner, the "limited time only store" with special merchandise is awesome to check out and the limited availability and fully themed store lead me to want to purchase stuff that I certainly would have overlooked or ignored if it was just thrown in the main store up front between Harry Potter Wands and Minions stuffed animals. I've never been to the park around X-mas but have to admit one of the things I'd like to see most is the seasonal store and it's special wares.
And it's a STORE. Everything has stores. They don't have Grinch houses/mazes and holiday cheerzones full of cheeractors or anything. They aren't flooding the streets with green fog for St Patrick's Day. They aren't having a night time add on event for Easter. They don't have a turkey carver drill team at Thanksgiving. What differentiates HHN from everything else is still the same, the fact that HHN was the original guinea pig for having a fully themed limited time store that has been adopted by other limited time events isn't a bad thing.