I don't see anything wrong with the amount of elbow drop by itself, but it looks even in the pics like it's happening very close to or at the point of contact. Your head is also lifting as is your shaft.
My own personal drop was always more of a reaction to following through longer instead of stopping more naturally after the stroke. Wasn't a big deal, may pros shoot like that, but I found occasionally I was doing it too close to contact. Eliminated that by making sure my grip was not too far forward. I also shortened my stroke on most normal shots, I only take the cue back 4", maybe 6" at most, have all the power/spin I need and more compact motion, easier to keep everything in line day to day without needing to practice to much.
If you are committed to eliminating the drop, it can be hard just because it feels so unnatural, especially if you play half way decent and have been playing for a while. But you can do it, and you can minimize or delay it for sure with a little work. Shoot easy shots while training, anything with power is going go bring that natural drop back. Shoot just the cue ball off the spot into the far corner pocket, record yourself or have someone monitor your drop. Feel it with no pressure, object ball contact, etc. Then start out shooting easier shots and gradually move to longer or harder shots.
One thing might help - have a friend push down on your upper arm while taking your practice stroke. That little bit of downward pressure will fool you into pushing up with your arm/elbow and might help you get the feeling of keep that part stationary and letting your grip hand come to a natural stop. Just holding something there doesn't always work, I know it didn't for me either.
Good luck!
Scott
