My katana are all much lower balance. And yes, I've done a pretty fair amount of sparring with swords of a wide variety of sizes. Katana are cutters, not choppers. A blade that size should NOT be thought of in the same breath as a baseball bat or anything else similar. The design is optimized for cutting, and chopping, bashing, etc, is a VERY bad idea. If you're trying to block a baseball bat with a katana, you're in trouble anyways. I don't see how you can want forward balance and be thinking about chopping if you've taken kendo? Honestly, that makes no sense to me. Not trying to criticize or anything, but my training indicates speed and flow are primary concerns with a light blade like a katana.
That all being said, it's YOUR sword, and you should absolutely tailor it to your fighting style. What others find comfortable shouldn't be a concern. However, I do want to caution you that chopping and blocking heavy weapons with a sword is a really really bad idea. Instead, you want to rely on movement and speed. Don't parry; move out of the path of the strike, and take the weapon arm or the leg. You wouldn't fight that way with a rapier against a club user. That's a good Western analogue, in my opinion, to a katana.