Mistwell
Crusty Old Meatwad
I’m referring to this from the sidebar at the beginning of each UA:
Power Level. The character options you read here might be more or less powerful than options in the 2014 Player’s Handbook. If a design survives playtesting, we adjust its power to the desirable level before publication. This means an option could be more or less powerful in its final form.
But you’re correct, it doesn’t explicitly say not to provide feedback based on power level, so I did overstate my case. I would still say that the implication here is that feedback based on power level is not particularly useful.
They will make refinements based on feedback. Refinements are not feedback based on "interest." They've even mentioned people thought some things were underpowered or overpowered and made specific refinements based on that feedback. Heck, the Counterspell changes were initiated because people said for years it was overpowered.