I assume it's safe to say if Bob and Roger were still in charge, full studio audiences would have already returned?
No, not at all.
The current showrunners are spending thousands of dollars per episode on COVID compliance every episode. They have to pay for 200+ COVID tests per tape date for every audience member & crew member. I am sure they would rather that money be used in the budget in other ways. It definitely isn’t being done out of convenience.
Roger (or anyone else) can’t magically wave a wand and tell TVC employees “we don’t WANT to pay thousands of dollars for COVID testing, so we won’t, hope you’re fine with that” or tell the unions that provide key crew members “yeah, your contracts says you’re entitled to X working conditions as part of COVID compliance, but we don’t want to do those.”
If the union that provides cameramen & grips & production workers says “we require everybody that potentially could come in contact with our members at our workspaces to have a negative COVID test”, your options are 1) tell the union to buzz off & fire all of your workers and try to find new ones—not a great option and a great way to make enemies in a town where everyone knows everyone, and the production quality is sure to take a massive drop; 2) tell CBS that they need to massively increase their budget so they can conduct six times as many COVID tests every episode, and potentially 1200+ on a single taping day, and they have to pay for six times as many medical personnel & testing equipment to process all these in a timely matter on-site, or 3) wait for the unions to change their requirements.
Sure, Roger (or anyone else) might have priorities or things he would *like* to see happen, and he might try to negotiate for them, but there’s no guarantee he gets them.