Unai Emery is a good coach no doubt but i think he's not so great with league but Cup games. When you take good look at his teams position in the league or performance they've mostly been inconsistent. The team UCL progress this season has been the only positive thing they've been far too inconsistent in there league performance. Same thing happened last season.
He has been great as he achieved for Villarreal what they've never but with Villarreal he needs to stable the team and make them get consistent results, they have what it takes.