His stint in the EPL was very patchy (comparable to Guarin at Inter) but he’s killed it everywhere else he’s played.
As someone who’s watched him a lot, I think Miki can be an excellent squad player, provided he stays fit.
Versatility: He’s played everywhere from defensive mid to second striker. Though he’s most suited to playing behind two striker.
Directness: He plays with his head up and is always looking to pass the ball forward. If the team moves around him, you can trust Miki to spot the runs. Despite losing his explosiveness with age, he’s always relied more on game-smarts.
Attitude: Miki is the classroom goody two-shoes. He’s going to work hard, do what the coach says and not cause any issues. IIRC the guy has a law degree, speaks half a dozen languages and basically has no personality whatever.
Confidence: He’s great when he builds up momentum, but he can be slow to adjust and I can see him failing to adjust as a bench option, especially if age becomes a factor.
Turnovers: He can be prone to trying high-risk plays and causing turnovers. And while he can often dribble out of trouble, he doesn’t have the speed he once had.
On the whole, I think he’ll do well if he stays fit.