ubisoft story DLCs tend to be pretty good and very large, I thought AC Odyssey and Valhalla's DLCs were better than the main game. So I'd rather just wait 6 months, buy the ultimate edition of the game for basically 2 months "cost" of ubi+, own it forever, and slowly take my time playing through the main game and DLC without being in a rush. Plus all the usual bugs are long fixed by then.
still, if you do sub to ubi+ i'd recommend Prince of Persia Lost Crown, I bought that a few months ago when it was $15 and 100%'d it and really enjoyed it. Not much story but the level design and gameplay loop was very satisfying.
its cool to see this heavily uses ray tracing, be interesting to see technical videos comparing the PC version to consoles when it comes to visuals especially with/without AA.