Rotem,
I think you are working from a few assumptions, some of which may not apply, and I would like to take some time to help you understand this.
Firstly, you seem to have a certain perception of possession. You seem to think that if you are the one to create a Hebrew Wikipedia, you will be the one to have full command over it. This is probably similar to how some athors consider articles they write as "theirs" and get annoyed when other people edit them; however, one of the fundamental basics of Wikipedia is that we are a collaborative group, and neither an article, nor a whole Wikipedia, is under the control of anyone.
Secondly, you seem to regard the Hebrew Wikipedia, or the idividiual Wikipedias in general, as more separate than they actually are (or should be). Although technically they are separate installations of the Wikipedia software and use separate databases, they should ideally be, or at least look like, parts of a whole. All the Wikipedias collectively form the entire complete Wikipedia project. If you'd change the licence of the Hebrew texts, it wouldn't be Wikipedia anyway. The different language Wikipedias are interwoven in many ways not only by the Inter-Wiki links, but also by ideologies like NPOV and the GFDL, as well as a common PHP codebase that will remain the same for all of them.
Now the layout. You do know that we have three distinct layouts already, right? We have "Standard", "Nostalgia" and "Cologne Blue". If you are absolutely convinced that a significant majority of Hebrew readers will dislike all three of them (which, frankly, I highly doubt, because I don't see how the layouts are so overly dependent on a cultural background or writing direction), then there is always the possibility of creating a new layout. Although this new layout will, if the majority agrees, be default on the Hebrew Wikipedia, it will automagically be available to all Wikipedia users in their preferences.
I hope this clears up a few matters, Timwi