I propose to make a different tree product regen rate for default trees and self-planted.
In most cases it's more or less fine, but planting high Q birches/apples/nuts is kinda ridiculous in terms of place/resources/time for 2 barks or 5 apples.
For instance tree Q may impact not only branches/logs Q but also growth rate (ess), products amount (sub) stunt chance (vit)