It seems the idea died together with the discussion about it. Still, as a month old mp3 (planning to move mp4 after I finish Mya's quest) will support a few arguments already raised in this thread:
1. uniformity and even chances cannot be achevied in people controlled game (I would not consider it a balancing feature); alts, people will md friends and given mp veterans will most probably have advantage over complete noob long enough that the noob goes to the next mp - the question is: whether they would exploit the advantage spoiling the game for other players
2. my a month-old mp3 experience: no massive beefed-up abuse; I was attacked but a few times by some killer squads - much more annoying were elemental attacks I got quite a few times (I do not think accidental, learned how to deal with these); if people want to be ugly in a world with few rules, they will (and as far as gameplay is concerned, they are more deserving to be banned than just mp-semigods, just sitting around)
3. as for ultimate fighting in MD... my attraction to MD is a complex world with puzzles to figure out and people to interact... it's nice to collect trophies (crits) but as far as fight go MD is average, to put it mildly - would not expect many people to play the game for fighs alone
4 finally: I suspect that quite a lot of people leave the game as before they start reading and drop pre-existing typical game concepts they go mp4 and rules/ world they did have time to begin to understand get more complicated and a cushion to fall down - harder (and: they have already lost an opportunity to learn basics of tutorial quests); maybe some more effort and safeguaerd should be implemented to protect new players from their own initial conceptions
I do not own any unit upgraded high enough to matter here and plan to move up before it would matter - but even though my interest is not immediate I wouldn't consider it to be a major problem