This doesn’t really bother me, but I liked the idea that one could watch The Clone Wars and then the Original Trilogy and it would preserve and even enhance the ESB reveal. But this finale heavily implies it anyway, so ¯\(ツ)/¯
Also Ahsoka agreeing to help Maul was a pretty surprising moment, but then she fought him anyway. It’s a good thing the duel ruled. I predict they’ll help each other during Order 66.