Yeah, I'm also in the same boat. I get you can technically just buy it separately, but considering the shorter length, I kind of wish there was something for those who just... may not be able to access this mission pass.
My premium doesn't expire until the 28th so I could technically get a new mission pass gold thing that final week and claim everything I earned, but then I'll just be out of luck again starting the next week with the next mission pass so I'm just kind of permanently behind now which I don't think it's supposed to be set up as.
I was there for the original so I don't even necessarily need everything, but there are some new stuff I really like (such as the Christmas outfit) that are still locked to the gold section.
Honestly, sometimes I wish it was possible to just buy the few things I want from the passes This is why I hate how they're bound to people.