If you're looking for new features to add to Kiwi Log Viewer, here's one that may please many: the filter and highlighting features are nice, but they apply their text match to the entire line. It would be very powerful if instead we could limit the match to a particular column (whether relative, or using a column header name if they're available in the file).
Along those same lines, some log files have no header in the file, but a separate file names the headers (which can be reused across all log files of that type). Again, if you're looking for new features, one would be a way to allow us to name the file to use to get the column headers for a given file.
The tool has lots of nice features already. Again, I do say thanks.