Not bad. Although I'm not typically a fan of found footage stories, this did at least give a unique spin to what would otherwise have been a very generic Doctor Who story. Although the constant shifting from perspectives and the static got very annoying very quickly.
Although, this does summarize what is going wrong with Doctor Who nowadays, there seems to be some sort belief that there always has to be a monster and so we always get one inserted, despite the fact the story could have been so much more interesting without one. It happened earlier this season with The Woman Who Lived which could have been better served had it just been a character drama between the Doctor and Ashildr without the pointless lion man inserted into it. And this episode could have easily left out the sleep-crust monsters and focused on the mad scientist having an evil agenda and had to be stopped.
And really, blind monsters that track by hearing, therefore making the solution to "don't make a sound. Don't even make a sound." We've already had too many Blink copycats already.
The news of a sequel doesn't necessarily concern me. While the episode and story are shockingly generic, the world they created of 38th century Sol system is interesting enough that it's worth revisiting and developing. Hopefully next time as a proper story.
I found Clara's negative reaction to the Grunt being a grown soldier very strange. This is basically the same thing the Sontarans do, yet Clara has never reacted this way around Strax. Okay, so her anger seemed more directed at humans for basically creating a race of cannon fodder, but why is she getting pissed off at these people? They aren't the ones who made the decision to do this, and the Grunt seems to be a valued team member. Well, at least Commander Nagata wasn't willing to risk the Grunt just to save everyone else.
Loved the in-joke about the name of the Silurians. Especially since it was subtle compared to all the annoyingly obvious in-jokes we had based over our heads the past two weeks in the Zygon story.