Marc said it all, already. That's precisely how it is. As a musician (or an artist in general), you are not living in a vacuum. You have to see what the market is doing and to react. Glenn and Joe brought out something, a brand, called BCC and this moniker stands for classic hardrock and it draw a lot of people who actually bought the record and many of them saw or heard Glenn for the first time. The reason they bought BCC is that they love this type of music and when they slowly get to know Glenn, they will see that he can embrace it all, funk, soul, blues, jazz, even near-metal-like heavy rock (Mollo projects). But it is the absolutely right move now to continue in that kind of vein, also with his solo record. Anything else would rather confuse the new fans and would possibly turn them away, but as potential new longterm fans, we have to get them slowly aquainted with the whole bandwidth of Glenn's music.
Beside that, I think Glenn can very well decide for himself what direction he might wanna choose, as he is home in all of them, as we all know.
Diversity is an ADVANTAGE and not a weakness, even many still don't get this. I see this in my friends circles too. Some people just don't get how I manage it to listen to Metallica, Madonna, Abba, Al di Meola, Mike Oldfield, Beyoncee, King Crimson and Symphonic Slam at the same day. To me, as to any real music fan, this is no contradiction at all.
Musicians don't draw these "borderlines" or "limitations", its always the fans first and foremost.
Also a musician wants to develope and to not repeat himself over and over again. Stagnation is going backwards. Another thing many "fans" don't get.
However, Glenn speaking about "funk for the more cultural audience" does not imply that the other groups, the rock-fans, are "not" cultured or low-lifes. He just meant it in a way of that being a bit more sophisticated music, which is what it is.
I for one do like whatever Glenn puts out and its also clear that he can't please everyone. We all have our favourite albums among Glenn's incredible back-catalogue and also have our "non-favourites" as well. No drama at all. We are all human beings. All different. Luckily