So lets talk about Bruce and/or Dick trying to kill the Joker and how Jason would react
It would Not go the way so many people in the fandom think. Bffr Jason would not immediately be perfectly okay with them, in fact it would make his relationship with Bruce WORSE.
Like, you think Jason would be okay with Bruce saying he didn't kill the Joker because Superman stopped him? No he fucking would not!! Because he knows Bruce has kryptonite!! And sure, lets say Bruce didn't have it on him, and the helicopter still did explode so he did think the Joker was dead. THE JOKER SURVIVED AND BRUCE LET HIM LIVE. All it would prove to Jason is that he was worth nothing more than a temporary loss of control. People seem to forget that it wasn't JUST personal revenge for Jason, that was a major part sure, but it was also the fact that that wasn't the final straw.
"Ignoring what he's done in the past. Blindly, stupidly, disregarding the entire graveyards he's filled, the thousands who have suffered... the friends he's crippled... I thought... I thought killing me-- that I'd be the last person you'd ever let him hurt." -sourced directly from my copy of UTRH
It was the same thing as Tim being Robin. It wasn't solely about his death, it was that his death didn't change anything. People were put right back in danger because the Joker faced no real consequences other than a beating that was worse than usual.
And leading into the Dick thing, you think even if somehow, by some miracle, Jason forgave Bruce for all that it wouldn't go flying out the window the moment he found out Bruce RESUSCITATED the clown? You'd genuinely have to think Jason has no spine. Because not killing him is a personal choice, HELL even preventing others from doing it could have some form of explanation, but actively BRINGING HIM BACK FROM THE DEAD?????? There's no excusing or explaining that away.
But onto Dick. I genuinely think most people just. Haven't read Last Laugh #6. Dick sought out the Joker because he thought he killed Tim. Sure Jason was mentioned at the beginning, and sure Dick wasn't fully trying to kill him until the, "I hit Jason harder than that" thing, but as a whole it was less about Jason, and more about Tim. Because Dick hadn't gone after the Joker when Jason died, only when he thought Tim did.
I think it would be a step in repairing their relationship, but it certainly wouldn't be the magic fix people think it would. Because at it's core it wasn't because of Jason, it was because of Tim. Jason played a factor, but he wasn't the reason.
And there's also the immense guilt and "the Joker won" mentality Dick had about it. Jason would not be supportive of that, come on.
Anyway, just my thoughts around it, but I really shouldn't be surprised how people recontextualize stuff and treat Jason horribly OOC to fit him into the batfam.