Yes and no. I think all 3.
Allow game cash to speed up build time or instant build. This means cash rich clubs have to spend some of there cash and making them less rich. May also mean some will sell players to get the cash.
Use USM points. This will make use of something we never use. This will allow less rich clubs keep up.
Use real cash. Will will get cash into the upkeep of the game. Will also allow clubs with no cash or points to keep up with everyone else.
I feel by doingball 3 we have covered all options.