I think the problem is not only with the hotels, but rather the whole dilution of true Pesach values. Pesach has become a huge, huge, industry. It is almost nauseating to see the "new" products that look so much like chometz, taste like chometz etc... ( wither they really do or not is a different story). It is not only the hotels. The whole indulgence to have Pizza, Bagels, Doughnuts, etc...
I will give you an example of the problem with all of this:
Close to 20 years ago I remember going to a Chol Hamoed arcade venue of where I saw Frum kids buying Coke from the soda machine. It was clearly not Kosher L'Pesach. But why should the think twice? Coke is on their table at the Seder after all! It is for this reason I will only buy the less desirable Kosher brands of Soda on Pesach. This was 20 years ago.
I know that there was talk many years ago that Entenmann's almost had a deal with a Kosher Bakery to label Pesach Cakes for them. Imagine if there were Kosher L'Pesach Entenmann's???
Do we really need Pizza and Doughnuts? What happens when they perfect it and the Pizza looks and tastes like Pizza? Will we have a whole generation that just remembers eating Pizza and Doughnuts on Pesach?
I know the Pizza and Doughnuts are extreme examples, but the whole yom tov of Pesach is about creating limitations, if you look in Seforim. I am not saying I don't buy products, but at least your family should know that on Pesach we don't need every type of indulgence.
However, once you go to a Hotel, you are most likely being served every type of indulgence; at least that is the impression of those who do not go...
If you stay home, at least there is a chance.
Some people need the hotel for various reasons ( no time to prepare, elderly, not capable of preparing, don't have room for the whole family, etc...) but I just can't condone it for the mainstream.
It is a slippery slope... My 2 cents...