>But you can't really see all the game's content because so much territory is controlled by hostile teams
There's not that much to see out in those systems. You're definitely not missing any major story lines or lore because of it and the planets and suns are similar as everywhere else.
But are missing story line and lore and missions if say you're a goon versus anyone else. You can't go do missions outside of your controlled space, build standing with those other factions, etc. I always enjoyed Eve and thought it was decent eye candy and of course the meta gaming and stories the players created are vastly more entertaining than the game itself.
Still maybe it's just me being a completionist but I'd love to visit every part of the game. Fark it. Maybe I'll just resub and fly throw away stealth bombers until I do. But I sure as hell won't be able to mission with every faction.
There's not that much to see out in those systems. You're definitely not missing any major story lines or lore because of it and the planets and suns are similar as everywhere else.