It appears that these forums are primarily for tech help (and not for discussing the game, sharing screenshots, etc). That's where the improvement is. It's also why in the Sims 4 section all technical help categories are listed before the creative and discussion ones (and why default sorting for each thread is by "most liked" and why we can mark solutions). I don't think there was any intention to push visitors of the old forum which focused on discussions out, but because the user experience of these forums is so awful for that, trying to discuss the game here seems barely worth it.
Unfortunately, we make up an exceptionally small percentage of the player base and more people seem to be leaving all the time, so it seems like the old categories will become basically dead by the end of the year. Only Heroes and a handful of others will be left.