IMDB has writer & director information for the remaining episodes:
Sound of Thunder
director: Douglass Aarniokoski writers: Bo Yeon Kim & Erika Lippoldt
Light and Shadows
director: Marta Cunningham writers: Ted Sullivan & Vaun Wilmott
If Memory Serves
director: T.J.Scott writers: Jay Beattie & Dan Dworkin
Project Daedalus
director: Jonathan Frakes writer: Michelle Paradise
The Red Angel
director: Hanelle Culpepper writers: Anthony Maranville & Chris Silvestri
Perpetual Infinity
director: Maja Vrvilo writer: ?
Episode 12
director: Douglass Aarniokoski writers: Bo Yeon Kim & Erika Lippoldt
Episode 13
director: Olatunde Osunsanmi writers: Alex Kurtzman & Jenny Lumet & Michelle Paradise
Episode 14
director: Olatunde Osunsanmi writers: Alex Kurtzman & Jenny Lumet & Michelle Paradise
The last 2 episodes have the same writers and director, so season finale could be a 2 parter. The expansion of this episode is probably why they added an extra episode.
Episode 12 has the same writer director team as episode 6 and "The Brightest Star" Short Trek. So this could be another episode about Saru's home planet.
Episode 11 has the same director as "Runaway" Short Trek. Maybe a follow up?