I bought the standalone Gill and this Friday I'll just get Seth and be done with it.Yeah I'm in the same boat tbh. I already bought everything I wanted throughout the years so now paying £20 for two characters and the costumes I didn't want is putting me off getting it right now.
I already have all stages except the Gill one, plus I don't care about costumes, so the 25€ upgrade isn't worth it for me.