We added our expansion/contraction rules to our consititution a couple of years ago. You can see it here.http://spot.colorado.edu/~simpsonp/bvl/ ... tution.pdf
There is also a couple of anti-dynasty clauses later in the winter roster section and the spring protection list section. We stagger the number of players an owner can keep based on where they finished. Since we have done this, no team has been able to win the league in back-to back years. Several have come close but no one has done it.
As to inflation, I think you are just going to have to eat it for the next couple of years. You are going from a very shallow league to a much deeper one so there are going to be some players way under market locked up. There is not much you can do unless you re-draft.