I voted "happy with all of these," although I guess I'm not totally happy with any of them.
I would say that the defensive midfield has been a bit inconsistent for my liking, and maybe only average-ish overall. I think it needs to improve.
That said, I also predict that next season they will be much better. So I don't view it as a high priority for us. Even if Wanyama leaves, I would like us to use Reed.
I don't know who might emerge next year or who we will play or if we will rotate. But I'm not too worried about it. RK will figure it out.
As has been said, when Vic is in 'beast mode' he's the most effective (as a stopper) of the three, but by the same token if Romeu and Clasie continue their rate of improvement, I don't think losing Vic in the summer will be an unmitigated disaster. I hold no fear of Romeu/Clasie with Reed in reserve for next season. It's the person in front of that which I think needs improving.