In some instances rev limiter is used, with an rpm setting slightly under the shift RPM to unload the trans for the shift. There is a variety of ways to active the shift rev limiter. A strain gauge is used on some setups so that when you pull the shifter, the strain gauge signals the rev limiter. Or a switch at the very beginning of clutch travel, so you just put pressure on the shifter, then tap the pedal enuff to throw the switch but not the throwout bearing to make the shift. Or a switch on the shifter. Some EFI systems also have the capability of interrupting the power for the shift. Some guys apply pressure to the shifter, then just let the engine hit the overall rev limiter to complete the shift.
So what you envision is being done in various ways.