I entered the preflop ranges in crev, set it to run equilibrium solver for the river, and IP defends v 0.625 pot river bet 55% after calling flop, and checking back turn - of which 12 % by raising. Which results in SB betting only 25% OTR - fine and well so far.

In my DB, I'm find 50+% folds here from CO, which I locked as CO river strat v bet, then ran max exploit - and crev says we bet almost all of our bluffs and nothing else - defending v a bet (45% freq he bets) from CO v 69% of the time - 20% by X/r.
This seems really odd, because this model now closely represents player pool behaviour as best I can tell from my db - I should really rarely or NEVER value bet river? wtf?