I didn’t reply to this yet, because I have replied to many other variants of the same things before.
I don’t think raising K without first revamping the whole rewards formula is a good idea and you can find my analysis here:
In essence, raising K will not stop multi pool operators to spin up more pools. Many of them don’t even have to split their pools since they have already prepared for this K increase (they are less than 50% saturated). It’s therefore questionable how much ADA will flow over to smaller pools. But it is not questionable that single pools that pledged not to split their pool and are successful, will have to either also start splitting pools or see their delegators being forced out. Finally what is also not questionable is the fact that increasing K will require a lot more resources to run the same network (since more pools means more servers). This is worth it if MAV (decentralizationn of the network) will increase enough. But I wonder if you still think that MAV will increase enough after seeing my analysis above.