Both of the last two appeal to me.

I hated the Starkiller Base from the beginning and only allowed it to grow on me from subsequent viewings. It’s kind of the bad guy version of deus ex machina.

https://www.merriam-webster.com/dictionary/deus ex machina

Far too convenient and contrived when just thrown into the second act without any indication that it was coming. I was thoroughly disappointed with it. I truly believe it needs to be mentioned early on, or else I find it a cheap plot device.