I'm going to stick my neck out here and say we might improve a little bit but the fans expecting us to be fighting for the title are going to be disappointed. Other teams will improve and I think our open style will mean we are always easy to score against. I doubt Ange shifts from his fundamentals enough here; he likes inverted fullbacks and the two CBs always have so much work to do in this system. We could definitely keep the ball better at the other end of the pitch, so I do see significant margin for improvement but I don't think our Plan A will ever be watertight enough to challenge for a title.People have blown the one little soundbite out of proportion. If you read the full quote it's obvious he's not saying set pieces aren't a problem. He literally says performances and defending on them are disappointing.
He's just saying that fixing the set pieces isn't "one secret trick" to solving our problems. There's a complex of stuff that needs working out and he's paying attention to all of it.
I reckon going into next season, not only will we be better defensively, but our set pieces will also be a lot better.
Of course the proof is in the pudding. Let's see what happens.
Depends what you want - if you are happy with 4th-6th and some crazy, gung ho and entraining football I think Ange is fine. I do feel you will be disappointed if you expect more than that.