Absolutely loads to do for offline.
You'll get 2 whole, that's
2 whole competitions to play from day 1 to day 365. 4 games in each. They don't change, and they don't reset once you've completed them and get the initial rewards. After that you earn pennies. But like I said...
2 whole competitions for an entire year!
Each week they'll also add in a new comp to complete for a 'free' player. Usually they'll consist of 2 games, but if Konami are feeling generous you might get a 3rd.
That's it. 8 games on day 1, then 2-3 games per week. They clearly work their asses off to give us those.
Btw, in true Konami logic fashion, the comps are usually upside down. Meaning you'll get the toughest team (eg. Real Madrid, PSG) first on the easier difficulty (Pro), then the weaker team on Top Player/Superstar in the final.
Credit where credit is due, takes a lot of of effort to consistently f' up the simplest things.

Oh, you can also play exhibition matches against other user teams (usually their default starter teams). After you win 20 odd games on the easiest difficulty it'll move up. If that sounds boring, which it is, you could always play Coach Mode! Press play and watch an entire AI vs AI match. Awesome.
Compare that to the bazillion offline games & comps in FUT.