LOL, you posted a link to a blogger, who claimed "only a small fraction"... has been utilized, who did not substantiate his claim. vs pentagon claims 75% of Russian combat forces are in Ukraine and French sources that put the number at 80%.
You fail easily to realize just who that “blogger” is.....
A veteran of the CIA and the State Department’s Office of Counter Terrorism.
Provided training to the US Military’s Special Operations community for 24 years.
Would and will continue to take his analysis over that of anyone within the US/UK/NATO/EU military, etc. any day. Bet.