I guess I just have an itch that I like scratching.

ComicTool 0.4 adds:

Saving/Export: Save original downloaded file or export to CBZ and PDF.
Added Editing: Delete and Undelete pages. Reorder pages. Export changes to CBZ and PDF.
Added keyboard shortcuts.
Added dragging of main image in scroll viewer.
Reintroduced thumbnails at the top.

Try it out!