Re: the striking kings from the rolls issue, wasn’t that basically what William did with all of the previous kings of England? Edward the Elder and Edward the Confessor aren’t counted for the purposes of the regnal numbers of future Kings Edward.

I don’t think that one can be laid at William’s doorstep (compared to, say, the Harrying of the North). After all, there wasn’t an Edward for another hundred years after the Conquest, so the numbering decision was made by a different dynasty. And as far as I know, William made the Confessor’s supposed decision to make him heir a part of Norman propaganda, so it wouldn’t be to William’s interest to write him out.