I don't think it's off topic at all; it's great to have input from everyone.
I think the largest problem is Carcassonne takes up a lot of table space; I doubt I'd ever be able to play it in the back of a car for example.
I agree the The Carcassonne Travel Set doesn't really help, because it is not compatible with all the expansions people like to use too.
I'd like to see a roll out magnetic version, but maybe digital formats would win outright for limited space; but you can't beat being able to play at a table.
I sometimes travel with work, and I think it would be nice to have a neat box to store a 'travel' deck I could grab and take with me in the off chance a colleague might want a game..... I have to stay hopeful