Besides the experience points, you will also be able to unlock packs of cards using rare or elite status which will surely rank up your team degree and thus functionality. So on each subsequent leveling up of this MUT degree, you receive rewards with Mut 20 coins. These start with a tiny quantity of MUT coins which you are able to spend in the shop to training packs to full elite and superior player packs.
In these benefits are also special cards called power packs. What they do is increase the stats of a specific card by a few points. Since you unlock more levels, you are going to get more power packs which will rank up your stat level on the cards even higher up, up to 90 even. Do notethe climbing goes up every time you level up, which makes it much more difficult to level up on higher levels, so that requires a bit more grinding.
Additionally, there are flat caps, so you won't have the ability to max out on solo challenges if you simply stick to a single degree of difficulty. That's the reason why, it is most useful if you're able to bring yourself to be able to manage the challenges of a more demanding A.I etc..
Solo battles also get the job done, as they can reward you a few good XP without taking on some harsh CPU competitions. Difficulty is very linient in this manner. Also once you've unlocked the Auction and Trade section in the store, you can purchase players with higher stats that will help update your group to buy Madden nfl 20 coins. Go for the more cost effective ones though. Finally, you are able to try out the everyday Challenges never to get behind in the race to max out on your MUT degree!