For a system design that intends for super heavy boosters to return directly to their launch towers and be able to fly multiple times in short periods, it seems like there is a lot of work to do on the launch facility itself. Obviously, a water suppression system is going to be needed so that spray instead of concrete gets blasted in all directions.
But, I have to wonder about the idea of having such a massive vehicle return directly to its launch infrastructure. It seems that it would need to be extremely reliable in its return, or otherwise the cost of the damage from destructive incidents would make the whole system design too expensive to keep operational.
I'm no Elon Musk, but I think I would have something like superheavy return to a catch tower that is well away from anything to do with the launch infrastructure, and then have it roll a few miles over to the launch pad in some way.