I would rather like 10M lfr version. q time will be hell of shorter. u can do with 2/3 heals. finding 10 ppl is 2.5 times faster than finding 25 :P
Nope it would be longer.
10 Man requires 2 tanks 2/3 healers and rest dps.
25man requires 2 tanks and 6 healers. so the only increase is healers.
The queue would be even longer for the poor bastards doing DPS. If you made it a single tank fight on each one then you could possibly help decrease times for a 10man LFR.