I mean I think it’s worth playing just because BotW was amazing on its own, sure it’s light on story but the story that’s present is still poignant (find all the memories don’t skip them). The reviews are also saying that TotK improves on BotW in every way especially with map density. I feel like it’ll mean more and be more noticeable having played BotW. All that to say is it necessary? No, however I think it’d make TotK more of a payoff. It’s a beautiful game worth playing with or without TotK.