Well, that can be included in what I said, but overall I just mean that you should strive to make every note you play, be it quarter, 8th, 16th, 32nd, etc. hit right where it's supposed to so that things don't sound stuttery. I mainly hear it in your ghost notes (not horrible or anything, just where i heard it most). They can be damn hard to get down precisely. It's common to just drag your hand along or mash notes in there instead of focusing on precise hits with precise separation and dynamics, which throws off a groove. This is where it's good to have a grasp of reading music since you'll have the right sense of when/where every note is supposed to go. You mainly did a good job, just have to tighten things up (so do I).
A great help is to practice 16th note single strokes, always to a click, accenting first the 1 and ghost noting the remaining 3 notes in each bar (the "e", the "and", and the "ah"). Then do the same with the "e", then the "and", and then the "ah" all in the same fashion, and don't break the single stroke pattern. the downbeats (the 1 and the "and") will be played with the same hand, and the upbeats (the "e" and the "ah") will be played with the opposite hand. when you have it down, then do the same exercise, but double up the unaccented notes so you are playing 32nds. Do it to a click because the click doesn't lie.You should also practice different 16th note phrasings in this same fashion, and it's especially great if you read them.