My two cents on this, I'll quote myself from a conversation on another thread, regarding MWA's approach to the newcomers-veterans gap, both F2P and P2P

While this holds true for most games, I don't really think it applies to MWA, since there's no direct competition between the players themselves, unlike games like PPS.
PvP and Ranking systems are walls that get larger as time goes by, keeping newcomers (specially F2P) away from getting rewards, unlocking stuff, etc.

But in Aigis, if you fail at completing an event, you don't really lose the possibility of getting the featured unit, you just need to wait for a revival or for another event tha happens to drop the unit you want. And most importantly, you don't have the risk of waiting for the next event, and being hard trolled again by veterans. It is just you and your hard work, what older players or P2P do with their accounts will never prevent you from obtaining a certain unit.

That's one of the greatest things about MWA's design, IMO. You can join at any given time, play at your own pace and eventually get results. Might as well post this thoughts on faketurtle's thread.
IMO that flexible dynamic is a huge advantage, since it allows each player to advance and enjoy the game at his/her own pace, which is particularly appreciated when you see the opposite side in games like PPS.