Can you let me know of the advantages you're trying to achieve with higher rev limit, please? I'd actually want to lower it a bit with the CVT.
Sure, I have a different vehicle (2015 Honda Fit LX CVT) but consider us in the same family.
I have custom grind cams from Deltacams, which are wild, similar to the old school Deltacam 272 grinds for Hondas. The car idles and drives fine with them. However, after installing them, my 1/4 mile times dropped by about 3/10ths of a seocnd. I believe the power band moved to the right.
Currently, my CVT maxed out at 6600rpm then tapers back down to 6100rpm or so, while going wide open throttle. I'd like to set it at 7000rpm or so since I believe the powerband has moved to the right with the cams.
Also, take a look at a couple of these dynos for the 2015 Honda Fit.
Here is an HPD Cold Air Intake before and after dyno no a Fit --->
Here is a stock 2015 Honda Fit before and after tune with Ktuner -->
Stock Fits (both manual and auto CVT) peak power is at 6500rpm but these dyno's still show the car making power up to 6900rpm or so.
Even J's Racing of Japan tuned their Fit up to 6900rpm and the power isn't dropping off -->
So, since I have the custom grinded cams, I wanted to move the CVT's peak rpm point to the right about 500rpm to 7000rpm to take advantage of the extra power I believe is up there. Even with the same torque at 6500rpm, revving to 7000rpm will make 11whp extra.
I didn't realize the IMA issue with CRZ. Unless....that could be programmed to continue running then as well.
I have to go look at the powerband for the CRZ but when modifying, you'd want to move the peak rpm of the CVT to where the new peak horsepower is. Like this video states (Skip to 1:53) -->
In your case, if your peak powerband move downward in the rpm range, the same thing applies. I use Ktuner for my platform but I'm researching if any tuning software has this capability.