I agree, with no to much manupilating..
personally I keep always my basic 11 players... and sell the not needed reserves to lower the quality some..

Because if you sell half of the team, what I read on the forum before, it takes to much time just to buy a new squad....

So in this way I limit the time I waiting in the market to buy new players.

But with my new team (now level 5) I got always 1 or 2 teams competing for the league.. I like exactly more teams so even if you lose 1x it is not directly costing the title..
So every one can win from every one that is more fun and in the long run more rewarding then win almost every match with 7-0 or something