Welcome back Ozimax, and thanks for sharing your thoughts around your move to the OMD.
I've been considering a similar path - unloading my heavy and bulky FF gear and purchasing an OMD E-M5 kit. Even Scott Bourne has gone this path recently, dropping all of his current Canon equipment in favor of the smaller, lighter, cheaper Olympus kit.
What keeps me from making the move?
While I have no doubts that the IQ and performance of the OMD are amazing for a m43 camera, I'm skeptical how well it can hold up to FF DSLR IQ, especially when pushing files in post. I don't want to feel like I'm sacrificing quality - but expect that is the trade-off for smaller size/weight.
Secondly, I'm skeptical that I'm not simply lusting after the camera and trying to rationalize it. Would I really carry an OMD kit more than my Canon kit? If it is smaller and lighter, but still requires a bag and carrying multiple lenses/accessories I'm not sure it would truly get more use than my FF setup - which would defeat the main purpose for me - carrying it with me more, and taking more pictures.
I've been using a Fuji X10 for the past 14 months or so - it has been a much more constant companion than my DSLR and provides excellent results for what it is, an advanced point + shoot. In good light and with proper exposure the files look great, and they print well too. Fuji has great color.