Yeah, the dagger is kind of useless once 3PO says to go to the Endor system. It’s pretty obvious once they see the DSII that it’s on there. 3PO even says ‘emperor’s vault’. But if you wanted to keep it, I think it would be better if the dagger activated the door to where the dagger is. No unnecessary and unrealistic goonies moment. Personally, I think you could cut around the dagger easily. Just cut Rey’s line about needing it and also Finn mentioning it to Chewie. Just have a voice get Rey’s attention. Could be one from her vision/her parents/whatever to make her want to investigate it more. All you have to do is get her into Kylo’s quarters somehow, following a voice in her head. Then she can come across the dagger coincidentally while she’s there.