If Siebold does use it to lift the players, it won't be the first time. Bennet used it to great effect during the 90's. The problem I see is Siebold came into this club openly attacking the old regime. Of course there were going to be players and ex-players sentimental to the previous coaches, and this could not have helped in the bonding of the team.
He should ignore everything ex-players and coaches do and say from here on in and build the team he wants. If an idea of bennets was a good one, take it and use it, even credit it to bennet for those players i've already mentioned. If he tries a new approach, do so but without castigation of previous methods or ideas, explaining why and how.
I think for for the most part he has done the second but forgot to do the first. Bennet's name shouldn't even be mentioned anywhere or with anything, unless a reporter is seriously digging. Thank him for the club he has built and tell them he, siebold is taking it with him to another premiership down the track.
When Bennet came in, he didn't slag off Griffin. If he did, Hodges and parker would have gone the way of maguire. No one wants to hear, they have been complete twats for buying into the old coach's methods.