The heroes are interesting.
Baba Yaga's a flying hag with A3W1D4N2; Alexej's a D1B2H4 human who's old enough to be a Twiceborn candidate and who attracts Khlysts; and Koschei the Deathless, well... is unusually old
Not something to build a MP strategy on, but fun.
Bogatyr multiheroes are a nice bonus. H1 cavalry commanders / standards.