Also Oshitsune isn't banned as opposed to lot of other stable 4* cards.
Nooooo, Riots aren't anywhere near threat level.
They've got a Solid 3 Star in the form of Weasel face and they have a good 5* but they're about average.
Huracan is not as strong as they used to be.
Nightmare / SOB make it easier to deal with lots of clan Bonus'es and such. Also easy to half deck with unlike the mainly mono Piranas