Excuse me, but if this is not beta anymore... then maybe it's time to delete old accounts so everyone gets a fresh fair start? I still see lots of players with full black mechs which are most likely made when items were dropped easier and were easier to upgrade.
Accounts will most likely never be dropped. A lot of people have donated towards the game now and refunding these players will require a lot more effort than allowing the game to just continue as it is.
As far as black mechs go, items may have been easier to obtain in the past but there was no way of knowing how fusion was going to work. It's not like players stacked 1,000,000 legs right before the update for fusion came around. The players with black mechs have black mechs now either because they play the game so much more than others or they're willing to put money towards the game.
The only advantage older players got were they had an advantage in owning legendary items without having to go through the luck of item boxes. However this can still be fixed (and I really hope it is). If not over time as people play more, more people will collect legendary items so the game will slowly balance itself out (even if I'm really against this idea, as I'm sure many others are too).