Röhl I have no idea about but he's rated highly enough and you always need players in the centre. He's young and can be shaped for what we need from him, will have great role models and professionals to learn from in the squad.
Gueye will probably leave end of the season or be a rotation option next season, Irougbunam we don't really know if he'll make it, Armstrong hopefully will make it with us and
Dewsbury-Hall can play any number of positions. Garner looks be be kicking on and we all hope will become a key player.
We need 4-5 players in the squad who can play right in the middle of park as there are always injuries, fixture congestion, African Cup of Nations, players moving on at the end of the season, etc. Bring him in!