Numbers observed according to the page of aoeiv.net.
I think the main problem is that drop-hackers are getting away with it, disincentivizing the game. Addressing that issue urgently with some faster anticheat/reporting system is sorely needed.
In custom games they can improve the numbers, although they have not decreased. Color mapping needs to be implemented as soon as possible and more compatible mods to improve the UI.
In 1vs1 Ranked there is an improvement, but you have to take care of team games.