some kind of Hardware- Rendering is on Top of my List

We're getting an optional OpenGL hardware-accelerated display. If CL doesn't remove the preview-export feature from our Make Movie options, you should be able to spit out a halfway-decent test animation in a fraction of the time it'd take to render. I'll be reserving final judgement until after I've seen it for myself, but even if it's no better than DAZ|Studio's real-time display, that'll be a major step up for Poser.

Second is a Foot/Floor detection to prevent from Feet sliding over the ground or getting through.

I find it fairly easy to switch to a side- or front-view in outline mode, enable IK on the legs, and then tweak each foot's trans values manually at selected keyframes. But I guess you're looking for something automatic, eh?

Personally I don't like Poser's Toy-like looking UI by the way.

Yes, a number of people don't care for it. But many have grown accustomed to it over the years, and would also object if CL scrapped it for something else. It's one of those damned-if-you-do, damned-if-you-don't situations.

At least there should be a fbx-animation Import and common bvh not just Poser-special bvh.

I'd like to see Filmbox import/export myself. It's always a good thing to support more standards.

"Poser-special" bvh?