Frathouse not in, artist still making the art for the huge event and streaming it on thrusdays if you ever want to see.
Bloodthirster you just need to have done his events at the gym in the prelude to 3 and advance the story a bit in chapter 3. Either fucking him or not.
You're up to the point of the story where Trald wants to get into the frat party where Crimson told you how? All it requires, that and either his bro training in the prelude or the part where he hits on you and such.
If you're having trouble, can you file a report on our bug site along with your save file telling the issue just in case it's a bug or something.