Did you test the IR in your DAW before adding to the Kemper?
Consider checking your settings in Deconvolver when you process the recording:
Reversed Technique = checked active, Normalize to -0.3 dbfs = checked/active, rest = inactive
IRs transferred to the Kemper usually sound (to me anyway) completely different than when used in the DAW with an ampsim. I feel very very lucky when I find one that sounds good in the Kemper
The other option is- load an ampsim with a similar gain on the track with the logic eq you mentioned, and use the Kemper to capture a profile of that.
If it sounds pretty good, try the new profile's cab with your Kemper DI profile from step 3.
You can try to capture a profile without an ampsim too, I always preffered the other way.
I think this whole process is very subjective as mentioned above to a particular guitar setup, and doesn't transfer well to other people's rigs. Every tone match IR I've tried usually has unpleasant frequency issues. Don't have Izotope to try tone matching myself.