In regards to aerial ability, the PL team who have won the biggest percentage of "aerial duels" they've faced in the league this season is..... Manchester United. For all the good it has brought us.
Whereas a side like Man City face the fewest aerial duels. In fact they face so few that they rank bottom in terms of both the number won and the number lost. And they benefit far more from that than we do from being the more aerially dominant side.
I would suggest that were ETH to play as he does at Ajax, we would be adopting an approach closer to City's than perhaps any other side in the league does.
In other words the first priority should be how much a defender will contribute to reducing the amount of threat (aerial or otherwise) we face. And then only subsequently how well they deal with the threat that remains. As opposed to beginning with the assumption that we'll be bombarded aerially non-stop and prioritising that as the non-negotiable.