Hello! It's all right, I understand that episode 4 is somewhat overdue.
Episode 4 contains new elements that have never been done before in Gyakuten Live, and to my knowledge, never been done before in any Ace Attorney fangame or even official Ace Attorney. Said elements are also rare if not completely unheard of for fangames in general. I believe it should come out before the end of the year, and I hope it will be all worth the wait.