On my Superior Perennium Blaster I will go from 5s to 8s Burst and 22s to 34s Full Auto. I think that you can that is a pretty huge difference.
P.S. And yes, all done with stop watches and w/ and w/out Skill Locks.
One of my earlier suggestions was to redo the way all the Specials Skills affect specials recycle time like Burst. At 1s off for every 25 pts of Burst Skill you only need 700 Burst skill to meet the Burst hard cap on a MBC. Basically, any profession can do that easy, i.e. an Enforcer.
I know I stopped raising Burst and casting Riot Control because I don't need extra Burst skill. So if we and Fixers want to remain masters of Burst well then skill needs to reduce Burst recycle less. Same goes for other specials too, if Agents want to be masters of AS, reduce the effect of AS skill on recycle time.