Good for you Slidebustle and BACrewboy;
There are plenty of younger pursers and CSDs about that are only there because when Midfleet was introduced back in the day, they, when maincrew, decided to ignore the self-interests of Bassa, and give it a go.
I don't know a single one of them that regrets it. I have heard only good things about Midfleet and the mixed flying. It had a younger demographic of keen SCCMs who were willing to ignore Bassa and go for promotion.
There are, however, an awful lot of old girls/guys who are still main crew after all these years who really do regret not doing it! (They will be the ones shouting loudest telling you not to do it!!)
As you say, weigh it up, and give it a go if it suits you despite what Bassa may say. (They won't be the ones paying off your mortgage)