Well, SetaYoshi and I made the SMBX2 equivalent of those things.

This level automatically imports all basegame textplus fonts as well as ones located in the Font Tool > fonts folder, with the latter being listed first. As examples, I've included the fonts from my "font factory" thread.
Currently there's three separate modes:
- the Preview mode shown in the above gif
- a basic Edit mode for changing font and per-character properties
- an About mode with credits and maybe more info in the future idk
Download it here (Github repo)
Known issues (as of v1.1.1):
- Entering values for spinboxes via the keyboard is currently broken doesn't work sometimes and idk why
- The columns and rows spinboxes do not affect the font in-level, and changing the height of a character only adjusts its texture coordinates (changes to all three will still save properly to the output ini)
- glyphdefaults editing
- Font image display mode as an alternative to the test string display
- Sound effect toggle button
- Tooltips maybe?
Hopefully this helps with creating new fonts for your levels and episodes!