I don’t think there’d be enough traffic (especially for the console side) to justify that kind of division. Besides, aside from updates (which are named for the platform in the News section anyway), bits of balancing (which get somewhat more in-depth than most of the conversation, are quite specific points and that I haven’t seen much discussion about at all) and a few specific bugs (which need pretty precise description anyway) everything here is platform-agnostic. So splitting the conversation into console and PC sides would also produce a lot of duplicate topics, and ones that would be useful for both sides.
Strikethrough text doesn’t have much practical use, I think. It’s a stylistic choice, usually reserved for humoristic purposes (and the kind of relaxed conversation that prompts that kind of humor is rare here, as you might’ve noticed). If there is a serious use, it’s to show plainly that you made a mistake, acknowledged it and amended the text. That can be done in other ways. I don’t have anything against adding it, of course, but I don’t think there’s any real need for it either.
As for my own wants, I’ll accompany @SmokerT69 here and say that the changes I’d like to see are more in the use of the forum than in its actual properties or capabilities. A shift to the forums being the primary channel of communication, and more conversation with devs (even if it’s restricted to particular, rare threads or a specific section, as their comments have a tendency to hijack threads otherwise) would be welcome changes. In all honesty, I’d actually also like to see a bit better formatting skills on some users, but I think that’s just sort of a pet peeve of mine.
Okay, there is one actual thing I’d sometimes like to see, but it probably wouldn’t end up working like I wanted it to: a Dislike button, to accompany the Likes. Often enough, I find posts that bring nothing to the conversation, are borderline offensive or somehow else disagreeable without deserving an actual flag, or whose points I just disagree with but don’t find anything constructive to say. In those cases, I’d prefer to just put a dislike in and move on. But Reddit (and other places) have shown that those are likely to be used simply to downvote and drown opinions you disagree with, instead of using them constructively.