I only have a file with his Origin (my other endgame save cuts off before his scene) and nothing has changed there. The Githyanki leave, Wyll looses his powers (or the other way around?), Gale contemplates the crown and while you are discussing what to do next, Astarion starts to feel the effect of the sun and has to run.
Originally Posted by t1mekill3r
I went through it like 10 times trying to trigger the epilogue on a modded save. Nothing's been changed. What they did in Patch 5 was make it so the companions in your active party get priority in speaking up at the docks. So now it's more probable to get his whole "oh I can still walk in the sun, no I can't" thing.
I also found out that sometimes he's the one who will offer to go celebrate, which makes his ending then feel even worse.
Thank you both. It would have been surprising if they would have changed it and no one in this thread said a peep.