I don't think Crush was a big mistake. If it wasn't released and if It's My Life didn't exist at all, I doubt that Bon Jovi would maintain their popularity as we can see and enjoy right now. Whether you like Crush's pop leaning or not is besides the point; Crush still saved Bon Jovi's collective asses. It's My Life is a brilliant song that singlehandedly kickstarted their popularity.

The way the current music industry work (at least mainstream music), you gotta have a very catchy and commercial single. Otherwise your album isn't gonna sell that good (platinum level). That's what happening with Bounce. It just lacks songs that can act as appealing single to the masses. Some people like Bounce's overall content and some don't but mainstream public only pay attention to singles that they hear on the radio.

I would say that if Crush did not exist, Bon Jovi would still draw great number of audience for their tours (see their contemporaries from the 80s - they pack concert halls). However their new albums would probably be largely ignored by the mainstream, only the die hards buy the albums and they won't be as popular as they are right now. I personally don't care whether Bon Jovi is very popular or whether they're riding high in the charts as long as I like their albums, I'll buy them. But from recent posts it seems that people want Bon Jovi to be extremely successful in the charts (there is nothing wrong with this by the way, success in charts will prolong a band's career). And yet the same people dislike Crush, saying it's a bad pop direction and all that. To me that doesn't really make much sense.

Tour in Europe will definitely increase the sales. I don't know by how much but it will increase.