Not everyone likes only getting desaturation. Please don't just think about your preferences when suggestion features for something that will be system-wide and is attached to packages useful for almost all users. (Whenever I try to suggest a feature request, I also attempt to express how it should be made a user-changeable settings option.)

What would be nice is if someone made Hildon Desktop not disable desaturation even if you disabled blurring. Then you could change what you wanted in the transitions.ini file, or with whatever app edited transitions.ini for you, including completely disabling blur but keeping desaturation. (As is, you could probably lower blur to almost nothing, without completely disabling it, allowing a slightly blurred-but-not-horribly-so effect.)