Miki is a good Midfielder, Even in Dortmund, he is number 1 midfielder in a club for a few years. No I think he is more than a really good midfielder, he is an awesome midfielder. I think he can be an option for the problem of manchester united this season and no need to sign another midfielder for January.
Mkitharyan is not the number 1 midfielder in dortmund and there are some other better than him. Marco reus is definitely much better than him and perhaps he is just currently having a good time at manchester united. There is no way to tell when will he turn into a flop anymore however I hope that he keeps this consistent performance