I'll just answer the ones I have something vaguely useful to say for:
2. Should this new so-called Amiga, use AmigaOS v4 or MorphOS?
AROS!
4. Would you like to see Amiga connectors for ZipStick compatibility and Amiga mouse comp.?
Yes.
5. What sort of Amiga keyboard connector is the best sollution? USB only support? PS/2 alike connector like on Amiga 4000? PS/2 connector?
The more the merrier.
6. How should this Amiga keyboard be? 92 keys like before, or PC alike form?
Unless you're manufacturing keyboards too, I shouldn't have thought you need to worry about that...
8. What sort of tower sollutions should we use? We want to continue Amiga 4000 T design and go further with this. Is this bad, or good?
I'd say start fresh.
11.
Is Amiga NeXT a bad or good name for this project?
Very bad. Steve Jobs would sue your ass.