I'd like to clarify that I've never seen Mr. Kolesnikov in action; just seeing one of his students whom he has given a dan grade and instructor's licence to was what put me off.
With regard to his student whom you found well balanced, well centred, difficult to move; it seems to me that within any style there's always a fair bit of room for individual strengths and weaknesses, and that not everyone is representative purely of the strengths and weaknesses of their style. I realise you understand this already, I'm just sort of thinking out loud in response to your post. And this particular student of his... he could be the exception, or he could be the rule. I've only met the contents of one dojo, and they were all of the kind that I described above.