We finally moved from 3.5 to 4.2.4 on the weekend, though this new editor is driving our users up the wall. The feedback is that it feels too beta like.
Some of the strongest complaints we are dealing with are:
# *Macro Browser*: For heavens sakes, we need to bring this up almost all the time now. In the past it was so simple that if you knew what the parameters were you could just type the, but now you have to click the macro, find the parameter, click it, type, click the next type.. agh; can't we just type this as we used to? Myself and others have bad eyes, we can't even see our mice at times, I also have RSI in my mouse hand and have trouble using the stupid thing, it's inefficient and much faster to just use the keyboard (and don't quote those cryptic keyboard shortcuts).
# *Copy and paste*: It's extremely unpredictable, and always tries to copy the surrounding macro from the copy. What's worse is if you copy inside a {{noformat}} or {{code}} block, and paste into that same block, the editor loses the plot, you can't delete the content, everything just s**ts itself.
# *Whitespace control*: there's no way now to be able to control white-space. Previously it would ignore the white-space, but now we end up with strange behaviour where a macro needs a new-line before and after it (say the {{note}} macro), yet you can't control this white-space. Try creating a heading, then excerpt in just one page and see what happens, the excerpt leaves either a massive whit-space or none at all.
# *Tables*: They're just wrong, trying to insert a table using the familiar wiki markup is unpredictable, type || test || {{press Enter}} and it behaves as expected, but try either || Test | test | or || test || test | and you end up with four columns. Content inside a cell is now extremely hard to control. Try putting a note inside a cell and see what happens.
# *Lists*: Don't ever try putting a macro in a list unless you want to screw the whole list up, they start going way out of control.
# *Images*: You can copy+past an image from your clipboard (like a screenshot), appears fine, but no attachment is uploaded and the image of course doesn't render. Also if you happen to accidentally drag + drop an image in a page, for example if you click an image to bring it up, then accidentally move your mouse slightly when clicking that image, it adds that image as an attachment to the page.
It has only been 3 days and we're going crazy.
We have contacted atlassian prior to the upgrade to see if we could get the wiki editor back but this proved fruitless.
The reasoning behind storing as HTML IMHO is flawed and should be thrown away; Douglas Crockford|http://www.crockford.com/ agrees. Why not just have used a {{JSON}} format instead? The argument around round tripping would have been solved.