playoffs shouldn't be allowed to last longer than an entire season. divide the 60 day season for each playoff round: for singles that's 20 days for each round and for clanners that's 30 days for each round.
I think a strict deadline that's the same every season would do a lot of good, because I've heard some really bad excuses for playoff games not being played.. if you've heard any bad excuses too, post them!
"relax, no one else has done their playoffs, we have tons of time"
"i'm going to clanner/i'm in a clanner"
"nah, I'm not ready right now/i'm not warm, sorry"
"i haven't even contacted my opponent yet"
"i'm lazy"
with a strict deadline, none of the above excuses would be allowed at all and they would be kicked out of the playoffs for wasting people's time. only extreme situations can ask for more time, but only then would a mod consider giving extra time.