As one of the stubborn (with score) and lucky (with no significant drama in roll-out and download) ones, I have some early thoughts.
They really should roll out the new visualization to all FSD owners. I have no idea why they feel the need to hold that back from those not in the "limited" group. In a recent conference call (the quarterly?), someone asked specifically when the dancing/spinning/twitching cars would be fixed. I found Elon's answer somewhat flippant at the time ("It is fixed") and screamed at my T.V. ("No, it's not, for anybody not in the limited audience (which is 'rounded up' 100% of the cars)!").
I also find the braking for green lights annoying and, frankly, unsafe w/r/t drivers behind me. It's very frustrating they haven't rolled out an improvement for those not in the limited group on this.
My gut is that Elon (and perhaps the entire AP/FSD/etc. team) is focused on the FSD beta and, apparently, consider it acceptable to not deliver significant improvements until a big step jump in the software is ready. Whether this is because they are "betting big" / "gambling" / "optimistic" or because they don't have a good way to peel off some improvements from the limited code branch is unclear to me so far. As time progresses, it seems likely that the limited code branch is like one gigantic pull request that has gone on too long and they don't want to invest engineering resources into splitting it into separate pieces to deliver in smaller chunks.