I hope they'll release a working, touch-capable version of ADE for win 8, and soon!
I wouldn't hold your breath, the bug-ridden ADE2.0 has been out for over a year with no attempt to fix even the most glaring issues.
The only alternative I know for reading Adobe DRM books on Windows is Sony Reader. https://ebookstore.sony.com/download/
It is designed for use with Sony eReader devices, but works standalone without.
I don't think there is a touch version yet, but maybe (no promises) you will find it a little less bad then ADE?
It does seem to have larger forward/back arrows to touch.