My issue with Benitez was never really the football. While he's a loathsome individual as well, I am quite happy to park that. To me the big warning lights were how committed he would be at the age he is at, and secondly how much of a long term vision he would have (or would we be straddled with more big name, older players).
On the former question, he does look to be really interested in the job. His effort level seems better than others we have had and he seems to really want to succeed. So I can't really knock him there. On the latter, it's far too early to tell yet.
As for the style of football, I'm in favour of him doing something different. That's how Atletico Madrid win the league. They don't try and outdo Barca/Real Madrid on half the wage bill. In the same way if we try to outdo City's pure football, or Liverpool intense kick and rush with about half the wage bill we are destined to lose. You have to try and find a different way, and be the best at it. To a degree Leicester have embraced that with Rodgers, who have a lot of technical players who are fast.
I have said multiple times, while Ancelotti did well last season, we left a lot of points in the bag, by moving away from a system that worked (the 4 cb's) to something more aesthetically pleasing. Had we have kept the 4 cb's for as many games as possible, we would have likely finished 3rd. I don't think Benitez would have any truck or ego in sticking to something that works, even if it's boring or unpopular. I actually think had he managed us the 2nd half of last season we would have got top 6 and probably top 4.
None of this means we have the 3/4th best squad as we clearly don't. But you don't always have to have. Football as with life is about finding the best way to arrange your chess pieces on the board and getting the most from them. Liverpool are not the 1st or 2nd best squad in the league, but they finished 1st and 2nd. That's the art.
I think this team suits playing defensive, tactically aware football. If we add 2 or 3 more players with a bit more power to help us on the break (like Dumfries) and become well drilled defensively I think there is room for further growth. The one thing we looked good at last season was maintaining defensive shape.