Wouldn't be surprising - as you say, you'd hope/expect there to be disquiet given the current challenges. Was interesting in recent games to see the amount of answering back to Robinson from players he was criticising on the park, eg Carson gave him both barrels in the Livi game at one point, but there have been a few others at it.
There were similar rumblings last year, partly around him showing favouritism to certain players at times behind the scenes.