Read this with some interest, it's really not an ideal situation. So far we are on the 4th clean install of Magento2 on a new clean system, installed 1.9x on the same instance first time without any problems.
We decided to try it as need to install for 100,000+ products so the issues are worthwhile to fix at this level, however if you only have 5,000-10,000 products the time vs effort really would be hard to justify. We also rarely use extensions and the custom code base is minimal so it allows an easy port, assuming it all works.
We will have it running in the next day or so and can then comment further, the problem with 1.9x is that it is looking very dated. On the pro side 1.9x has a lot of extensions, on the con side it has a lot of extensions, difficult to filter out the good from the bad so migrating to Magento 2 actually limits choice, which is not a bad thing.
The problem appears to have been related to a combination of browser caching and the way our NFS is set up, used Firefox instead of Chrome switching off the NFS and completed. It seems Magento 2 is compromised by the hosting environment, as it is partially rewritten any small issue looks to manifest itself in to something larger, none of these issues existed with 1.9x.
