Is there any other way to leave feedback...???  

What do you mean you have UAC disabled via registry? Does that disable you from running apps?

Even if you're running a local account, you can still choose to sign in on a "per app" basis (check the blue text), which retains your local account.

ps: You can leave feedback at the Tech preview forum: Windows - Microsoft Community

Rickkins said:

That's correct, no metro app will run with uac turned off via registry.

Whoh fast response! You can post feedback at Windows - Microsoft Community

Or Technet if you're running the Enterprise Edition/registered for that.

Can you provide a link to your post there? Lot of activity there so it's hard to find stuff.

The Feedback App is horrible.
I use a Local Account.

When I tried to use it, I had to jump through various hoops.
I couldn't remember or find the password for my TAFE MS account (requiring a password reset).
I had to apply for a couple of security numbers.
Once I got in (and after only a couple of steps) it looked suspiciously like it was going to convert my PC to a MS Account!

Looking at MS forums I've seen several people claim that is exactly what happened to them.

"we"?? Make that I'm and then your post is much more accurate.
....
Jeff