Frontier definitely tried to appeal to the typical FPS crowd with the on-foot conflict zones, which was a huge misstep: it was never going to be good enough as just a small part of a much larger game, and a lot of the existing players are much more interested in the space stuff.
If you ignore the shooty bit of the on-foot gameplay, though, it really does (or at least has the potential to) add to the core gameplay. Being able to walk around station hangers and concourses, prison ships, planetary installations and the planet surface itself is definitely increasing my enjoyment of the game.
The general hope is that they're leaving a bunch of the content releases - hints of new ships, SRVs and new thargoid-related gameplay - until the console releases for Odyssey in the autumn so that a large chunk of the playerbase isn't left behind. Sadly that means that us PC players are currently beta testing Odyssey, but after the recent patches it's just about performant and stable enough to enjoy.