Just when it seemed that Merson was doing his best to field an unchanged team, changes were enforced upon him.
Kinsella (just when he seemed to be hitting a bit of form) had picked up an injury and with Osborn already ruled out there was not going to be much experience out there!
It looks therefore like he opted for Staunton to add some experience and leadership into what otherwise would've been a very young starting XI.
Unfortunately this meant that he had to disrupt his first choice partnership of Roper and Bennett, but that was the risk worth taking.
He most likely thought that Gerrard would've added a bit of steel/grit that I doubt Kris Taylor would've provided.
Don't get me wrong, there is an awful lot of things that I am not at all happy with that has happened and continues to happen throughout Merson's tenure.
Unforced changes, team discipline, squad fitness, etc etc.
But in this case, he had to make the changes in my opinion.
Again, more unforced errors, missed chances, and clumseyness (which Roper and Bennett are both prone to - even before Merson) are all to blame.

TIN HAT - CHECK