Not sure, but I think the major issue was that our tight 5 were absolutely outclassed, particularly the front row. I'm pretty sure Max Craig (hooker) and Daniel Maiava (lock) are the only ones who played last year, so there's not going to be much benefit there.
I have a feeling that poor performance was a consequence of covid and those guys not playing much interstate rugby - the best tight 5 forwards in age group really need that concentrated competition to improve, more than any other position. Even in Sydney and Brisbane the stand outs are often going to be so far ahead of their rivals, particularly in a physical sense, as not to really be challenged.
That said I don't rate Grey as a coach and think there are plenty of better options we could have in that role, if he doesn't deliver this year it will absolutely be time to move him on (if it's not already).