Totally agree:

Bounce & 7800 tend to be 'heavier' and are the least good.
Heavy doesn't fit Jovi that much.

The only 'heavy' BJ has are the looks in the 80'ies that were similar to lots of heavy bands.
Sometimes they use heavy influences in their music which works great, but basiscally BJ have always been writing 'guitar based poppy & catchy' songs.

And let's be honest... do you want them to come out with something that sounds like NEW Jersey???? It's a great album and it sounded great when it came out, but producing that kind of songs with that kind of sound today would be a little pathetic.

Basically, doing such thing is the reason why bands like Def Leppard, Poison, Europe and other of their fellow bands in the 80's didn't make it through the 90's and 00's.