You can set withdrawal phases to slow down Hive removals from power pool.
The feature can work like a charm using a gradual withdrawal method.
Suppose, I have 100HP and I want it to withdraw immediately, now the only way I may withdraw 20% of total 100HP per week i.e. 20HP and rest 80HP will remain as it is until next 20% cycle, which could be 16HP or more depending on the user's HP growth.
I know many may not like it since it keeps withdrawal a bit slower, but helps Hive remain in the pool for longer.
Second feature those who Hold 50HP or more can be incentivized with certain percentage of %HBD per week, that HBD may remain in the public funded pools for a month to gain yields that could possibly help to buy Hive for delegation to new users, again a new pool of HP will remain in delegation for longer durations. A win win situation.