I think from a readability standpoint, you have definitely improved! The cleaner lineart and bigger font are great for mobile reading, and it's very easy to read your dialogue and tell what order you're supposed to read your panels and balloons in, which is the most important thing.
If you want little areas of improvement, I would suggest moving your speech bubbles further outside the border of your panels. You have a lot of empty white space around all of your panels, but your speech bubbles are often times crammed right on top of your art and your characters. One of the greatest benefits of a vertical scrolling comic is you can move your speech bubbles completely off your panel art, exposing more artwork.
Separate from legibility, since you pretty much have that in the bag now, the thing I would urge you to consider improving in the future is varying your camera shots. You have a lot of straight-on mid-range camera shots, which can be a little monotonous on the eye, especially during an action scene. Try to include a variety of close-up shots, longer distance shots, wide environmental shots, and shots that don't necessarily have a character's face in it (like a shot of a hand closing into a fist, or a foot trying to get traction on the ground). That will definitely bump your comic up to the next level.
But for readability and legibility, you nailed it!