Hi,
I have used the extension myself and I found some issues in there too but often the behavior are is unexpected but correct:
Cannot confirm this one, but maybe it is because you manually extracted the images. The “real” image folder has a very complex structure including the prerendered thumbs. Maybe you missed them?
Actually this is not true. The problem is that there is a convention in MW that all “highest level”-headings in the article are headings level two, (e.g. ==Development==, a level one heading would be =Development=) so they are correctly translated MW-level 2 to Xwiki-level 2. But Xwiki treats missing level one headings “badly”.
The problem here is that the MW syntax make an explicit distinction between internal links ([[Word]] and external links [http://someurl.tld/more]. So all internal links in the beforementionend article are expected to translate to wanted links. Let’s assume you import a whole wiki and start with pageA that links to pageB. If you changed the link to be an external link and then later in the process import pageB it would no longer link in the wiki to pageB but to the original source. Not what you would expect? Or maybe I got you wrong?
That would be a great feature.