Yes, as of now it is "good enough". Better than before, when it was VirtualBox-only.
Dedicated page about all platforms sounds good. I was wondering about that also. Finally, the Download page should be deprecated and redirect to a general small comparison page of supported platforms. (Mentioning stuff like supported host operating systems and so forth whatever is important for first time visitors. From there just link to the full platform specific wiki page.)
Yes, long term. This is what this thread is about. It initially started with a huge blog post if you don't mind to get back.
Blog post or not for now, I am neutral either way.