It is possible to do it within plugins, but that results in audible quality loss, as I’ve mentioned here: Curve adjustment for MIDI CC inside Dubler
Being able to do this within the Dubler is really important. A relevant example would be AddictiveTrigger, a plugin that is doing audio -> midi, similar to what Dubler does, and it features this functionality on its front ui, not somewhere deep within the options (see my second post on the linked topic for more examples).