As for the estimation of Snowden among the Russian opposition, you must realize what his journey looks like in our eyes.
He gave an interview to MTV in December 2011 where he lays out the problem in his estimation.
In the estimation of the retired general, readjustment alone can take years.
late 14c., "action of appraising; manner of judging; opinion," from Old French estimacion, from Latin aestimationem (nominative aestimatio) "a valuation," from past participle stem of aestimare "to value" (see esteem). Meaning "appreciation" is from 1520s. That of "process of forming an approximate notion" is from c.1400.