I've always felt grav wells were to small and scale with the planets was off versus ship size.

Realism vs gameplay, they decide to go for gameplay more often which causes the large ships and buildings compared to the planet and the gravity well. That said, if you're in range in pretty much the entire gravity well, that should definitely be tweaked.

Steel Division 2 had a novel way of dealing with scale. As you zoomed out the trucks got bigger to match. Meaning that when you zoomed in all the way everything was to scale. When you zoomed out things were made bigger in relative terms so you could see everything. If you wanted their was an option in the menu to set the the game not to make things larger as you zoomed out at all.

Half the point of sins is to watch the battles. I am not a fan of later total wars "icon or flag wars" where you saw nothing if you wanted to control the battle even a little zoomed out. Sins2 still has this problem where a tonne of things, not just the small fighters remain icons even a little zoomed out.

But yeah. Sins2 space feels very claustrophobic. Because the actual field you play on is tiny. 

P.S. Anybody remember Conquest: Frontier Wars? Which solved this by having entire RTS maps to jump and switch between?