I agree. It's not Romeu's passing that worries me, it's his sharpness in the tackle and turning circle (when he gets beaten) that fills me with dread. Compare him to Kante who was just impossible to shake off and, in the extremely rare event that you could, he would be back snapping at your heels in seconds.
A small terrier-like player that doesn't give up on a fight?
Now if only we had a player that fit that description...