There were things in the episode I enjoyed:
* The Doctor and Rogue were fantastic and so very, very gay 🏳️🌈, loved every scene involving the two
* The setting
* Shalka Doctor aaah
To be honest though I think the monsters left a lot to be desired. The line "We're going to cosplay this planet to death" made me roll my eyes pretty hard. I saw the fake-out with Ruby's 'death' and her friend being one of the monsters coming a mile off.
As much as I loved 15/Rogue I've gotta say the fact they went from meeting for the first time to 'Marry me' in the space of less than an hour is a little unrealistic and rushed, feels like an arc that should've developed over time...