The first year I did roto we had losses as a category, and we all hated it. There is not a worse feeling than having your pitcher throw a gem, and lose 2-1, and you get the L. Not one person in my league liked it, and we ditched it. H2H maybe, but in my experience, it's terrible in roto.
What we talked about doing last year, though ended up not following through on, is to charge a dollar a transaction after a certain limit. That money goes into the pot. So let's say you have a 50 maximum, and someone makes 72 moves, they have to throw $22 into the pot.
We didn't do it because we didn't want to give an advantage to the guys who have money to burn, but it's something to think about for money leagues.