I've recently been using the 'New wikitext mode' so I have access to it's enhanced syntax highlighting.
What would also be appreciated in terms of my "repair" edits would be integration of the search regexps that the tool here Wikipedia cleaner has for identifying CHECKWIKI repairs., There are other semi-automated edit scripts like auto-ed that would also be useful.
I'd also like to see consideration given to integrating something like User:PerfektesChaos/js/lintHint, given that it's currently not compatible with the mode.