I didn't find the avionics in falcon very difficult. Lots to learn sure, but once you know where everything is no big deal. especially if you have a HOTAS with plenty of buttons and modes.
Ramp starts may seem daunting, but it's just following a checklist. I did it a few times just to do it, but all it does is add 15-20 mins to your flight time. After that I just started from the runway. I put about 200 hrs into F4AF, beat several campaigns, then came right back to lockon. F4's FM sux IMHO, no matter if the "numbers" are right or not. Lockon "feels" like flying to me and that's what keeps me flying it. F4AF isn't even installed on my system anymore.