Just want to pitch in and say this is a great change, but I have a VERY important question:
How is "more common" determined? I mainly ask because I absolutely despise chaos wizards - as with most summons, none of their summons are ever a problem, but they're always a slog to get through, etc. However, it's actually extremely rare to encounter a chaos wizard outside of the chaos temples / D:48/50 because they're DL 35-ish and have very low weighting percent (they are about 5x more common than ki-rin and show up 5 DL later, so yeah). So: will chaos wizards also summon less even though they are no strictly a "more common" monster, but are in fact a very commonly encountered (and annoying!) monster?