Re: what am I missing? Honda has many more powerful "J"engines they can utilize
There was (at least) one J37 Ridgeline built. I didn't drive it, but I did talk to two people that did. I'll give what I remember as an exact quote, "it was a dog" (meaning not good). To the best of my knowledge Honda has no future plans for the J37 line of engines.
There are other limiting factors. First the VTM-4 unit is running near its torque design limit. If torque were significantly increased Honda would have to swap out VTM-4 for SH-AWD, but SH-AWD is much more expensive.
Another factor is that Honda doesn't have a transmission that will take much more torque. It's my understanding that they have a little wiggle room with the 6AT, but due to the small clutch pack surface area they're already running the fluid hot and at high pressure. Honda keeps teasing that they have a 7-speed dual-clutch transmission in the works, but as I've said several times it seems to be vaporware to date. Either way, I seriously doubt that it would handle more torque than the 5AT or 6AT transmissions.