Jibaku
Who let marco in here????
I think the auto 0 Speed IV feature when Trick Room is added to a moveset should be removed. In VGC it is more likely that Trick Room setters have nonzero Speed IV, and max Speed TR setters are also common. The 0 Speed IV feature not only adds more inconvenience than it is helping for the most part, it is also quite annoying when you set your IVs before adding Trick Room onto the moveset, only to have it go to 0 (and I've had at least one instance where I forgot that this was a thing and entered a battle thinking I've modified my Speed IV).
In the same vein, removing Trick Room from a moveset should not auto-snap it back to 31. IMO Trick Room's behavior in regards to IV changing should just be like almost any other move: nothing.
I'm sure similar concepts apply to other formats where Trick Room is common, due to the on/off nature of the field effect placing more emphasis on...well...having an actual Speed stat.
In the same vein, removing Trick Room from a moveset should not auto-snap it back to 31. IMO Trick Room's behavior in regards to IV changing should just be like almost any other move: nothing.
I'm sure similar concepts apply to other formats where Trick Room is common, due to the on/off nature of the field effect placing more emphasis on...well...having an actual Speed stat.