The ideal situation is that Roblox can improve their own social features to a point where it’s not necessary to have to direct people off-site. The debate about Discord/other off-site services feels really out of line with what the OP is asking for.
For me, I want to be able to hold meaningful discussions in my group and have an easier way to share information with my players, but it’s too hard with the current group system which is extremely outdated. The solution, as others have also posted, would be Lilly’s Group Overhaul/the recent hack week project for discussion boards: