[PS5] The Witcher 3 Remastered - Mid-way through DLC1

I was going to play the Steam version.. but the remastered version is just too much for the Steam Deck.. so I'm playing on PS5 instead.. Even the normal version seems to stutter a bit.. There's a slight delay after cutscenes.. lol Anyway.. digging up old memories, I'm in the middle of granting Olgierd von Everec his three wishes.. just the last one left.. He's demanding I retrieve a blue rose from long ago.. Is he kidding me? It would have wilted by now.. How am I supposed to get that.. What am I, a god? After heading to the quest location and getting beaten up badly by the caretaker I met there, I figured out his healing pattern and defeated him.. Now I'm farming at home.. but a grim spirit is picking a fight.. Ah, do I have to fight this one too? It's one problem after another.. In the end, I have another fateful battle with the ghost.. This one also has a healing pattern.. Died a few times.. but its health wouldn't decrease no matter what, so I tried a heavy attack and defeated it.. The Witcher's path is long and arduous.. I wonder if I can finish Blood and Wine before the new DLC comes out...?