wow im the only one who voted no...
the reason is simple:
bunny (my mech) has only 2 non-mythical parts, is not a copy of those one than kig or madao make popular, and i like battle vs any player who want feel the fluffy skin of my bunny feet on...
so, have 2 ledders is not only a bad idea, has no point.
you can get miths for free buying mixed chest like me (yeah bunny is full free).
so, say than you have years playing the game and no have good myths is a lie, i have playing 8 months, and 82 myths and counting, i have worked for it and im proud of it.
so, like in real life, if you want myths, work for it, if you want back your old mech because looks supercool, man take it out, clean it, upgrade it and put'em to fight!!!
thats why we have the chat, (yes is a secondary ledder) where you can fight without lost your rank, or your range on general list.
maybe the private battles need a reward on sm, but we dont need a third way to have pvp, the actual 2 are enough and fun to do pvp and rp