I made the permanent switch to Mantano Reader. I was never fully satisfied with the text rendering in Moon+.
If anyone's interested:
https://www.mobileread.com/forums/sho...&postcount=184
There's a 7 day trial app available. You can use your own fonts as well. Place them in the existing folder: sdcard/Mantano/fonts. The app recognizes .ttf and .otf fonts.
Edit: The app includes a user manual.