Nerfing as in "lowering monster meva for anything added since SoA." Fujito made a rather long post today explaining what they are planning to do earlier today, and Salalaruru posted about a few related things (like Frazzle base duration being increased to 5min so even a 1/2 resisted one will last longer than a full non-resisted effect currently.)
You should be able to get a general idea about it with Google Translate, just be aware that GoogleTrans is nowhere near perfect so you'll have to retranslate from what it spits out into actual English. XD
edit: BGwiki has a solid translation up if you don't feel like doing the work yourself.