I live In Kyiv and he recently did an interview. In this interview he was crying and said he was surprised that a Premier League club was in for him. He is very lucky to move here. He is in my opinion 4th best left back for Ukraine.
Sobol and Zinchenko are the obvious choices above him at international level However Ismaily is an Ukrainian National now, and he is better than Mykolenko but doesn't play for the national team for political reasons.
Zabarnyi is the real talent of the Dynamo team but Everton do not have a chance of buying a player like this.
It is a very strange business replacing a player of Digne quality with this guy. In my opinion in 18 months you will need a new left back.
I hope for your sake, I am wrong.