Ive been playing since OFP and i have to say despite its short comings i really enjoy arma3 and the capability it can offer. i feel that arma2 was "clunky" in comparison and is less enjoyable to play because of this, in my opinion anyway. as for the whole 40+ weapons thing i love having a core group of weapons that can be customised to nearly any situation, not have to decide on 105856739204 weapons for all the scenarios i could encounter. you can have a core firearm and carry additions in your kit to change out as required.
Also regarding the lack of content at release, it is a bit disappointing, however ill reserve judgement on the final version WHEN IVE ACTUALLY PLAYED IT.
#flame suit on