Heya,
Looking good, you've definitely improved your blending of flash & ambient compared to before, going in the right direction for sure.
CC:
Image 1 - Maybe drop flash output by 1/3rd of a stop to 2/3rds of a stop to make it more fill, in this case, it's closer to key exposure, to get a more natural looking blend. Also, a 1/4th CTO gel would have warmed it up a touch to make it blend in more naturally to ambient temperature light so it looks more natural.
Image 2 - Nicely blended, good very close to fill light. Maybe consider position your light opposite the sun highlight next time.
Image 3 - Very nice, but I would go for more depth of field so that you have the eyes & nose and jaw line in focus, not just the one eye. Exposure & composition and light are very nice. A little more depth of field so that more was in focus in depth of field would perhaps have made it close to perfect. At this range, consider F4 or F5.6 next time.
Great work, huge leaps from before!
Very best,