I don’t care that it’s part of a larger universe, I care that unless you followed the exact right part of that universe it makes zero sense, and that’s the case for a large majority of the people that watched this movie I’d bet.
I get that. I’m just saying that nowadays they expect you to; either know Maul is alive in advance, be motivated to go watch the cartoons, simply google it, or just wait and see what potentially happens in the following movies.
Love it or hate it, that’s just how movie franchises work now, they follow comic-rules.