and very clearly on the above examples it can be seem, again and again, that it is all a matter or personal preference...

Personally, I love walking around the boat. I rarely teleport. I like the eye-candy of the SH5. I extremely love Real Navigation - though that is more of a TDW win than Ubi's. It now feels un-natural to just plot the course, I enjoy (hm... not sure if mazocistical tendencies are good in this case

) having to find land in the fog, or trying to understand where exactly you are by the shape of the land... Or being completely lost. I'm pretty sure you can't really do that in SH3..
On another hand - lack of boats, crew management, morale engine, and no-career mode in comparison to SH3 is just... ugh.
The only real difference that I see, tbh, is the availability for modding.
SH3 pretty much modded out. People created tremendous and amazing mods for SH3, making it absolutely astonishing game.
But there is not much improvement can be done now.
well, where SH5 has a LOT to still work on.
As a side note, to my knowledge, Cybermath and silentmichael were working on Type II playable; I bet many people are working on properly cloning a playable unit (I know I'm trying to)...
We'll live, we'll see...