I think that the points about gentrification, ticket prices and half-and-half scarves (in terms of what they represent) are correct and have merit, but I think there is a bigger reason why the support seems to have changed in the last few years. I couldn't really put my finger on it at first but I've come to the conclusion that the reason is Pep - not necessarily than man himself, but what he represents and what we've tried to build around him.
Before anyone starts, I'm not ungrateful to the fact that we have arguably the world's best manager at our club. The football last year was unreal, the likes of which I never thought I'd see at City in my lifetime.
However, in the last couple of years it feels that the club has become somewhat detached from the fans; it's certainly how i feel, anyway. That has a lot to do with the commercialisation; everything from Tunnel Club and partnerships with the FIFA video game (talk about a Faustian pact!), to tie-ins and appearances with Youtube vloggers who have no connection to the club whatsoever. Our website used to be great - full of behind the scenes content and player interviews; now it's just endless tie-ins, commercial partnerships and content that seems more aimed at non-City fans than it is at Blues.
But I think it also has a lot to do with Pep. He is unique in that he is and always will be bigger than any club he manages. With Mancini we had a manager who embraced the culture and history of the club because he was always very aware that he worked for us; with Pep, you kind of feel that the club works for him. We are now very much moulded in his image - we're a 'Pep Team' - as opposed to him adopting City and City fans. It's not a personal criticism of him - it's the way he works, and he's earned that through his success - but under Mancini I felt we had manager who led the fans and whom we could get behind, whereas with Pep I don't think that fans have that feeling (same with Pellegrini, for different reasons).
I'm sure the expectation of success plays a part, and the expectation around a 'Pep Team'. In the Mancini years we were in the ascendancy, working towards our first Prem title and still with lots of work to do. Under Pep, we're expected to be at the top and expected to win. Therefore, it's no surprise that our support can be a bit flat - it's a combination of the expectation and the pressure, along with the club detaching itself from its traditional supporter base.