This didn't occur to me last night, when I was under the weather (still am this morning) after falling off my usual wheat-free, low-sugar diet (I occasionally forget how lousy pastry and chocolates make me feel, and the headache that was just starting last night is a full migraine today, along with cold/respiratory symptoms I'd worry are Covid if I didn't know how I react to wheat).
Anyway, it occurred to me (fuzzily) when I woke up this morning that possibly - not sure since I don't have the details - the initial plans for the show with just those three bands had been for a three-ring circus with the bands being treated pretty much equally. (In which case the producer's later "explanation" that he'd been free-associating and got to "circus" from that is BS. Especially since Mick reportedly had always loved circuses.) That show with just three bands could have been a really great show, especially if the bands had alternated songs from the start, rather than Mick treating the others as a supporting act with the Stones - and the audience - being really tired by the time they appeared as headliners. (A problem they ran into following Lynyrd Skynyrd hours too late years later, at Knebworth, with Skynyrd stealing the show at that festival.) The bands might have benefited from one another's energy and performances then.
Re how tragic Ronnie's life was - it should have been so different, at least in terms of finances (the MS, sadly, was inherited). The Small Faces were cheated so badly by management and their record label. As has happened to far too many artists.