I'm putting together a table for my site to keep track of which teams move up and down each year (I haven't found a simple way to access this in v.21 but anyway). I thought the raw numbers were interesting.
Across all 8 leagues I have a total of 28 promotion/relegation slots per year. After the second season of play (2022) 14 out of those 28 slots, precisely 50%, were filled by teams that DIDN'T just get moved up or down the prior year. No newly-promoted teams managed to get promoted twice in a row (my Pirates missed by 3 games

) and only a couple came close to getting relegated twice in a row.
I was surprised by the numbers I think because I mostly watched the top two tiers during the season, and of those 6 P/R slots only one was a new mover. Baltimore and Charlotte fell back into the lower league, Miami and Philadelphia won their way back up, and Milwaukee fell back down into the 3rd tier, so only the (really bad) Tampa Bay team was a new relegee. And that was the league I played in, so my Pirates may have skewed the results.
I think 50% new turnover overall is pretty promising, I'll be curious to see how it holds up going forward, and I'm going to watch the top tiers to see if some settings are off. I notice the finances in the 3rd tier where I intend to play next year are crazy with teams having $150M+ salary room which is weird with $450k minimum salary.
Just

for others trying it out!