I only just read this thread now since I had no plans to book a Premium Room Reward...
The issue that Hilton is re-categorizing rooms from "Standard" to "Premium" which results in massive points increases is not a matter solely affecting Premium awards. This affects the entire program. Think of all the all-suites properties for instance.
To the mods: could you please amend this thread's title to convey the magnitude of this issue? Perhaps with the addition of "Major Devaluation in HHonors Program" or something like that?