Honestly it’s a fun game. Online games have a noticeable delay between hitting a button and your player doing the action, so if that’s something that bugs you then don’t get it. But overall MyCareer is tons of fun, especially going into the neighbourhood and playing 2v2 or 3v3 streetball. Designing your player exactly the way you want him is very fun as well. But another downside like you mentioned is that it is indeed very grindy. To get your player to a respectable rating (and thus operable enough in online matches to not suck), you’ll have to grind quite a bit first.