Good!
I’d personally like the k parameter be gone (or equivalently set to 1). It doesn’t work. Entities that can rather freely manage large amounts of ADA (exchanges, custody services, …) can always circumvent it. Meanwhile, the community engages in in-fights if OGs with fiveish pools or builders with two are already evil MPOs, if running multiple pools on behalf of others is just as bad etc. pp.
Just remove saturation and let SPOs honestly concentrate all their efforts in one pool!
Restricting leverage directly, setting saturation to L times the pledge for each pool individually, would be the much more elegant solution that does not incentivise or even force pool splitting.
I won’t consider Kiayias as a definitive voice. The simulations done for the reward sharing schemes have spectacularly little to do with reality. And especially that quote does not make much sense in that generality:
Consider a whale having 70m ADA, so roughly the amount to saturate and pledge one private pool completely. If they do that, there are no delegators to gain something. If they split into two pools and pledge both with half their ADA, delegators worth 70m ADA get the opportunity to delegate to a pool with a spectacularly high pledge. If they split into four pools, they could still pledge them with 17.5m ADA each, which is still very, very good and would give 210m ADA of delegators the opportunity to delegate to a highly pledged pool. This goes on as long as the pledge is significantly more than what is usual for the other public pools in the market.
If that were the case, Cardano would be doomed. The vast majority of delegators will only do research as far as “How do I delegate to get a good profit?” goes. And that should be fine.
Parts of the community …
I don’t think an entity consisting of a lot of different people necessarily has to have a consistent stance on that.
Maybe what has been said in this thread is just the truth: That the ones responsible for the delegation did not want to be forced to exclude valuable contributors to the community just because they run two pools.
Which does not say anything about the opinion of the ones responsible for decisions on parameter changes.
Maybe part of the reason was also being fed up with the constant “According to my research that pool you delegated to is an evil MPO!!!” whining after each redelegation and the ensuing debates if a pool with no stake that happens to be still registered or pools run for others, but using the same relays, count.