I think it would be a brilliant idea.
From my experience of CMHT both as a user and an employee, the deluge of referrals could be cut if contact between a user and a MH professional occurred at first point. Many of the referrals were those from people who required more information that actual help - and were willing to help themselves, but the paperwork involved and the appointments that were necessary to do (usually over the phone, at inconvenient hours to those who were working) took up the majority of the time, adding to stress and unbearable work loads. In many cases, one phone call did most of the work.
I also agree with the poster who mentioned that GP's, due to time constraints, will often offer medication over therapy for two reasons a) treating the problem and b) knowledge of the waiting times for CMHT.
I also feel, especially for some, the experience of going to a MH professional rather than their GP may increase the likelihood of those who need help, actually seeking it - there is a lot of "Oh no, I don't have problems" when it comes to facing their own, sometimes family GP (although I'm loathe to admit, my experience suggests this is more a male feeling of pride) and may be more incline to see someone they wouldn't see routinely as part of any other medical intervention. Also, I noticed with a lot of male service users. they felt uneasy using up doctors time as they felt mental health wasn't a true illness and thus didn't want to bother them until absolutely desperate partners/families were intervening when the problem was far far more serious than it was initially.