I'm not saying they should sound exactly the same. That's near to impossible and also not what happens with traditional equipment.
But, as an example, I have found a P12Q IR that behaves very closely to the imprint and have found that it gives much consistency between stage and FOH. They're not the same, but the P12Q peculiarities really come through.
I'm just saying it could spare some work to have such an IR (or a few choices per imprint) at the ready that reflect the imprint choices.
I totally get what you are saying.
The "amp in the room" concept is great... but if the imprints create a sound on stage (e.g., Jensen P12R) that isn't matched to what is sent to FOH (mic'd up Jensen P12R), the player may not have a reasonable idea of what the audience is hearing. If the imprints are not reflective of what is going to the house, I'd rather use a house monitor; at least that's coming from the same source as the PA.
In effect, the imprints give you the flexibility to create an "amp in the room" sound that is not full linked to the actual sound going back to the house (which, at least to me, is counterintuitive).
Don't get me wrong, I think it's awesome that Kemper is adding cool features like the imprints (and I know some users were asking for it) - but I also understand the problems that markvs is noting here.