Sorry I never acknowledged the great feedback. You really have a great ear. I'll post the scores soon, I forgot that I didn't upload them earlier.
The Lacrimosa was the very first movement completed and Mozart's Lacrimosa is my favorite part of his Requiem so probably not surprising that it has the most obvious connection to it. The Kyrie was written soon after and I agree it's on the short side. It initially was a direct connection to a previous version of the Requiem part of the Introitus that I discarded but kept the Kyrie with only slight modification is as a standalone movement. Maybe I should reconsider that.