Why don't you like time-based PPLNS? What do you see as unfair about it?
Even though we've done the work, but if a block isn't found during the time while mining a certain coin before it switches again, that work time has been wasted, and just wasted power.
Like, even though we did the work but we didn't find a LTC block (for example) in a certain time frame we don't get rewarded for our efforts?
In reality, *ALL* of the work other than the winning share is wasted power.
And you do get paid, all you have to do is keep mining on the pool and be here when a block is found. Why should multiport miners get paid if the LTC pool finds a block on its own, 3 hours after MP moves off? Do you think that's fair? What if the people mining LTC have been doing it for 3 days with no blocks found? Should their reward be halved just because the multipool switched to LTC for 1/2 hour? That could easily happen with a proportional system.
PPLNS is a proven, fair way of distributing rewards to dedicated miners. With short, time-based rounds you lose your shares quickly after you stop mining, but your payout also increases to a full payout much more quickly as well.