To be quite honest, I've found the Rebels cartoon to be an infinitely superior take on the Star Wars universe than TFA.
The writing and characters are better, it's in an under-written era so there's room for the writers to play while still having plenty of guidance and reference material, the fan-service-y callbacks to existing characters and places are better-done, and while the humour in TFA wasn't too terrible, the humour in Rebels has really started to flow naturally and is frankly much funnier. There's no feeling that the humour is forced, or included because of some hanging obligation to "not be like the prequels" the way it did at times in TFA.
The show started off a little confused about how much it was going to be a kid's show - its predecessor The Clone Wars (the CGI one, not the excellent series of shorts by Genndy Tartakovsky), which I haven't watched, was nominally a show for young teens - and the first season occasionally featured awkward moments or episodes where characters were very deliberately non-violent or where events were bowdlerized in some way, but there were still many flashes of genuine Star Wars feel and a lot of great moments. But the writers behind the clunkier moments seem to have been relegated to other duties or have come around to the majority view and the second season has been really impressive, consistently exuding a real Star Wars look and feel. The second half of the second season is the first time I've really wanted to eagerly re-watch anything "Star Wars" again after seeing it once, other than the OT of course.
If you're worried about it being something juvenile, and thereby sappy or undramatic, a Star Wars with the hard edges filed off, you needn't fear. As I said, the writers have settled on it being a proper show and it's at least on par with ANH now in terms of writing, though perhaps not quite ESB. There's certainly little remnant of it being something for small children - Imperials are gunned down, blown to bits, or even cast into the vacuum of space as much as they ever were in any movie (the cast's equivalent of R2-D2 is a certifiable homicidal lunatic for God's sakes).
Both wifey and I have really enjoyed ourselves watching it, laughing and even high-fiving over some of the scenes, they are that well done and feel that much like Star Wars.