The cost is plenty high enough. Sometimes I wonder if the monthly cost is worth it during the off season. That's the price you pay to keep your teams.
I doubt the survival of PB is in jeopardy. Limiting the amount of new leagues should help reduce the number of available teams. Perhaps the issuing of available teams should occur more frequently, especially during the off season to allow for more trading.
I would also like to see more reallocation drafts. It's a chance to pick up a new team and build it to your liking. Reallocation drafts help reduce available teams.