I think we aren't in any position to judge (with the exception maybe of sub timing) his tactics, as look at the state of our squad right now.
It's mid table, everyone can see it's mid table, so why is everyone shocked when we are '*checks notes*' mid table?
I think once we get some more good signings, including some wingers who can wing, midfielders who are able to pass the ball 5 yards and block the opposition from waltzing through our midfield, we will be in a better position to judge where we are at as a team.
I wouldn't be averse to getting a new striker similar in value to Ollie also, as I believe we are limited in options there.
We need more options in areas where stupid mistakes are made, so the players know if they make stupid mistakes, then they will not in the team for the next game.
We need someone to show the team how to actually move off the ball, we need a corner and set piece taker (or 3) and someone to show us how to do throw in's (Jesus Christ that annoys me so much).
Some more creativity and some strength in midfield would do this team wonders.
Until then, everyone needs to just calm down and realise that it's going to be multiple years before we are anywhere near challenging for Europe, as you can't buy a Europe ready squad in one season in the PL, those days have gone.