User blog comment:B214/Season 3 confirmed!!!!!!/@comment-117.195.121.73-20150404184825/@comment-16281343-20150404185349

No. The thing with Issei's trauma and Rias' problem needs to be built up to work properly/best. Not just throwing it to the lap of the viewers like "Hey, I remember. I have a trauma about this." when it is needed.

Rias' build up already started in Season 2, then continuing on in Season 3 up to where it will be used.