Hi!
Navigator your RAW photos are ok.
Few problems you have there:
Too far away so details got eaten by lack of pixels/resolution.
These 3 photos are mostly facing towards sea so you have huge surfaces of blue. Sky and sea. Sky is reflected in water, water reflects it back and there is blue tone everywhere. Consider that in post production of raw images and compensate with WB correction or HSL sliders in Lightroom.
You shoot these photos in midday I suppose considering almost no shadows or short shadows.
In the middle of the summer and the brightest part of the day you cannot expect good results. Taht is why most of outdoor film/video or photo productions are shot during spring and early summer.
Also try to avoid midday.
Having small mobile phone size senzor on Mavic you have to more atention to light.
ND filters are not only for video.
ND filters are usefull photograpich tool, ESPECIALLY on cameras like Mavics that dont have the ability to meter light good enough but it makes compromise between highlights and shadows exposure.
It will prevent highlights to burn, especialy on these kind of shots, and YES it will lower the shutter speed, BUT considering that Mavic has f1/2.8 aperture, wide open f-stop, during summer and bright days shutte speed goes to extremly high speed.
Longer exposure means more color quality in images. More saturated and deeper colors beause there is more time to get light information.
Also for shooting landscape photos where difference between sky and land can be more than 5EV stops ND filters help to have less burned out sky.
Camera exposure algorithm "see" in black and white, using 18% gray as reference (for example color of skin in black and white) so sometimes you have to cheat. In example if you have lots of dark surfaces in frame and few that are much brighter those few will burn, or the other way around where dark subjects in mosty bright surroundings wil be underexposed.
USE HISTOGRAM, and EV numbers.
Learn photography. And remember cameras are dumb tools. YOU must lear how to use them.
Learn about the light, colors and things that make photography.
Having camera or camera drone and being able to take photos does not mean that you know how to take good photos.
Time of day is important, season is important, quality of light, understanding how stupid camera meter is important.
Know your gear and learn about the light.