I think we sometimes get tarred with being negative more than we deserve. Our formation and style of play means that we often defend with 5, but we also attack in numbers too thanks to the wing-backs getting forwards. Against better teams we concede possession more, but we completely dominated Villa on Sunday and should have won by a couple more goals.
Over the last three games we've had 62 shots, including a record 25 for an away team at The Emirates. For comparison, Leicester's last three games have seen 56 shots (which includes the Southampton mauling). And we certainly weren't negative when we beat Man City 2-0 at their place. Our problem at the moment is converting chances and not scoring enough goals. Something Leicester are a lot better than us at.
Someone else mentioned a lack of flexibility. When we first came up we played 3-4-3. That caused a problem in central midfield and results suffered, so Nuno switched to 3-5-2 and that saw us go on a run where we qualified for Europe and were a gnats chuff away from getting to an FA Cup final. This season we had a dodgy start, and we were often too deep, so Nuno has over the last few games gone back to 3-4-3, meaning he has gotten the best out of players like Neves and Traore. And we look a lot better again. We often switch between those two formations in the middle of games too, depending on how we are playing. So again I think flexibility criticisms are a bit unfair. We simply have an identity and style which we never move away from.
As for Nuno moving on to improve us, no. He's the best manager we've had in decades. He only needs better players to move us forwards.