People who want to make huge changes to Madden Ultimate Team will not be able to do so. The mode, referred to as Madden Ultimate Team (or MUT) by the majority of players, can be played just like any other mode within the Madden series. The players were able modify the team's uniform last year, but there wasn't much else. There's no reason to expect there will be a massive revamping or changing up of the game's look for Madden NFL 22.
The Madden NFL franchise mode has been the mode that receives the most negative comments over the past few years, in particular. The reasons range from the mechanical snafu, to the feeling that players that don't take advantage of the other modes are paying $60 to update their rosters. It's also true that EA has actually gotten rid of some features that used to be part of franchise mode. The most recent installments of the game sport a much smaller version than the first.