I mean, it absolutely should be a job most clubs have someone doing, every referee has his habits and in the world of "marginal gains", knowing those habits can be important. In the three games I've noticed seeing John Brooks ref in this season, he's not given a single card in the first half and then has been fairly liberal with them in the second - if that's a pattern that tends to be true across his entire season, it's not hard to imagine how a team could take advantage of that.
But do you need a high-profile and presumably comparatively expensive ex-ref to do that job, or could it actually just be 25% of an already-present analyst's job? In that respect, I do tend to agree with Rusty.