To debug errors, it would be handy to display in which line the error occurred. Since the editor is merging a figure with its template, the line numbers displayed in the editor are off.
Example: In a template the marker <> is at line 40, but the error is in line 2 of the edited file, so LaTeX displays an error in l.41.



Not sure how easy it is to fake the line number in KatePart, though.
Bonus: Its probably also possible to parse the log and highlight the line in question. :-)