Beetlejuice 1 was bad enough, why on earth they'd make BJ 2 is beyond me. I think JD is past the age of playing fantasy roles now and should stick with more serious, mature roles. Either way I hope TB does work with him again in whatever capacity.
I appreciate that JD is a deeply flawed and not necessarily likeable individual. I think his drug and alcohol problems have clouded his personality in the past to the point that I don't think anyone knows who the "real" JD is, including JD, and I think JD has spent his whole life trying to escape being JD in one way or another. I do think a lot of the emails and text sound like they were composed when he was out of it.
It also seems that he has no model for healthy relationships and mature adult behaviour. He's been able - and possibly needed - to retreat into a fantasy world through his entire life, surrounded by yes men because up until recently he's been a money machine, although the wheels can all too easily fall off, and I don't doubt that many who once sucked up to him would step over him in the gutter if it all fell to pieces.
I know that he need never work again and hasn't needed to for some time, but I wonder if needs the validation of acting and being admired for it, as many actors do, plus the escape into another world that acting brings.
I don't know if he is still abusing drugs and alcohol now or if he is managing to stay clean/sober, for however long. If he is not abusing then he will nevertheless be on a cocktail of prescription medication to keep from "flipping" or "sinking"; I don't doubt that for a second. The damage done in childhood will never leave him and despite years of therapy, I don't know if he will ever be able to get through life without chemicals/pharmaceuticals, be they legit or illegit.