Remember reading that crosses into the box provide a very low chance of scoring a goal I think it might have been just over 1% so I don't think you'll see many teams using it as a primary tactic.
Strand Larsen seems ok in the air but nothing special, you'd expect him to win some just because of his height. I get fans always want new signings to work out so they get more leeway when they are evaluated at the start, but the jury is out on Strand Larsen for me, there are some good things we have seen from him but probably not enough of them and he does go through big spells of some games where he is barely involved at all. Could be the rest of the team not playing to his strengths, could just be that he needs more time to adapt, could just be that he's not that good.
In the next couple of months i'd want to see a marked improvement on what we have seen from him so far.