I don't know if something happened in one of the previous updates but the abyssites seem to be taking longer then they use to to upgrade from clear to colorful.
I have had the pleasure (I know I am choking on that word too) of upgrading several dozen abyssites for various reason, and lately they are taking upwards of 30-40 t1 kills to upgrade to t2. I have tried to hunt in various zones both in the past and present and the results are the same. The upgrade ratio of t2 to t3 has been ~10 kills and boom colorful turns in to a color. I'm starting to wonder if something is wrong with the calculation for the t1 to t2 upgrade. I know that I can keep them from upgrading by having the next tier for that zone already (but I sadly tend to accidentally pop t3s more then I like to because the t2 and t3s always seem to hang around each other) if the Dev team could look into the matter that would be great. Though I'm sure they will most likely not even look at this and/or it is "working as intended to maintain balance".