1 and 3 are coming soon. 2 not sure, but might be bundled in the changes from 1 and 2. 4 Not presently in there. All of these have been opened before as well. I'll link this issue as a duplicate of 4 since it will still be outstanding.
BUG #1. Every other wiki I've used has the ability to create wiki pages by creating a link on page, saving the page and then clicking on the link to create the new linked page. I'd almost go so far to say that this key feature is what made wiki's. But your wiki just gives me a 404 Page not found error. What the?? This does not sound hard to implement. You just create the referenced page.
Yes I understand that you can check out the entire repository and do this offline but that's really not the point. I think a key idea of having a wiki is so you can rapidly create linked pages online.
BUG #2. Pages you create won't link if they have spaces in the title.
OK so the first thing I do for any new wiki is to copy/paste the home page to another page and add a link to it from the new (almost blank) home page. So I enter "Original Home" as the title of the page. This created a wiki page URL ending with "Original%20Home" . I then placed the link Orginal Home on the updated home page but this linked to a URL ending with "Original_Home" so the link was broken. OK so I figure I just need to rename the Original Home page to the ugly title Original_Home. Nope. Can't do page renames either??!! Sheesh this is one busted wiki!!
FEATURE #3. Can we please have link button on the toolbar to educate new users about the required syntax for a link. This one is so basic I'm calling it a bug though technically it's just a missing feature. I've just never seen a wiki with a toolbar that does not have it. I know it's not supposed to be Confluence but really this is rather basic.
FEATURE #4 Links pointing to missing pages should be highlighted. All other wikis I've show color coded links to indicate if they are broken or not (red if broken, blue if linked).