I like the HV but would want a higher current rating so if I choose to run LV that day (or in a certain vehicle) I can do so without worry of taxing the speed control and heating it up. HV is great and definitely the better way to go, no doubt there, but not everyone has the means to make the switch just yet. New chargers, batteries, motor's, etc. cost money, a decent amount of money. Buying a new controller would be step 1 in upgrading, then the other equipment follows. So while I'm saving to upgrade I want to be able to run my new controller in my current setup. Maybe that's just me though. An idea could be to do two versions, one of which is high amp. (I believe Castle has four versions of their new Hydra, 60, 120, 180, and 240 amps, 50v max)
Anyway, I would still rather see a HV controller purpose built for cars, I just worry about new guys who want the best x product, break it, and want it to be covered even though it was their fault and didn't bother to read any instructions. Grrrr... I remember when I was in Japan and I was helping a guy get his Mad Force running. I pull off the body and see there's no air filter. I said, "Dude, your air filter fell off." to which he replied, "Oh, no it didn't, I took it off because it felt more powerful when it was off.". I was stunned. The thing is, some people just aren't as into the hobby as much as the people on this forum are, for example. And they'll be some of the ones to buy this controller.
Sorry for the rant
Edit: Is the controller going to be 100 amp 12s or 200 amp 12s? 200 amp is great, I was referring to 100 amp when I started my post.