To be honest I'm not really a fan of the layout or the colors... The layout seems very drawn out even for a giga coaster. And the colors just look bland... The blue is way better than the white however if you fade the colors a bit it makes it look more realistic and gives the coaster more "life". Also the drop shaping is still wrong. Use Fury and Leviathan photos to use as a reference for shaping the drop. Also the turn around element looks a bit funky at the end.
My advice would be to start with the drop shaping and then move on and maybe not make the elements as drawn out as they are. Hope this helps. Feel free to PM me if you have any questions.