I think this also boils down to the end of the classical broadcaster era, when emcees had the clock in their head. Ludden trying to squeeze in the last password puzzle of the episode, Tomarken talking over whammy animation when there is a high spin count, Barker pacing out each game and dumping out of the Showcase Showdown when a spinoff is won, Clark always aware of the time at his disposal, etc.
Strahan might be the closest to that mold being steeped in live TV after football. The pacing is pretty much set for current Pyramid, so other than the Winner's Circle wrap-up there's no clear example of him doing this. I know from being in the audience in Season 1 that the introductions needed some time editing, and it seems there might still be a reliance on that. (Not counting editing in prize announcements.) Also, we can't evaluate Banks because the length of the bonus round is so variable, and she has to create more material than they might need.
Sure the production company loves the cost savings, but Bob said the added benefit to live-to-tape is that he controls what goes in the show (taking out the executive producer role for a moment). Why hand that control off to an editor to make a decision of what line to cut?