Hopefully things change, but I suspect Kamada might be a player that us fans struggle to get.
We are looking for moments of brilliance, beating a man, whipping in a good cross etc.
I suspect Glasner would like those thing, but will be looking at lots of other 'metrics', a lot of which will be tactical and positional that we are unlikely to see. Pressing at the right angle, starting position in and out of possession etc
Just a guess, but Sarr (for example) is likely to deliver more of the first, and Kamada more of the 2nd.
It might be why OG feels that Sarr is great coming off the bench for now.