Ive done Grasshoppers and it was VERY enjoyable (Basel are much better). Depending on your tactics and how you play the game you should be able to get European glory eventually, esp the Europa league.
I had one with Dinamo Zagreb on FM13 (the Basel of Croatia)
If you focus on the youth, it's gonna be a ton of fun for many, many seasons.
In my last season i played (12th i think) i fielded a full homegrown team in every league game. Feels really good
I won the Europa League too.