I enjoy all the aspects of the settlement design and layout - security levels, restricted area markers, etc. I love the cosmetic touches: how the doors work/sound, fire effects, depressurization, and (my favorite) the way the reactor vents when you shut it down.
The on foot combat is decent. I've love the ability to clone profiles and sneak around. E-breaches are nice too.
And while I haven't successfully done it yet, I love that full physical multi-crew is a thing now. Team mates can use your (extra) SRVs, board your ship, etc.
Frontline combat zones are fun. I like being deployed by a dropship and the quick/painless respawn if I die. Certainly much more friendly than the rebuy one faces when losing their ship in a combat zone.
On foot Assassination missions are a blast. They are also the first time a "mission complication" can make a mission much easier. I love it when the mission giver tells me "They've been tipped off and tried to flee. We managed to disable their ship. You need to hurry." That always means they're going to be out in the middle of nowhere on a planet, with no guards to sneak around, and a ship I can scavenge parts from.
In short, minus the bugs, Odyssey is at a good
starting point. I believe back during the 2 years of secrecy, the devs did stat they were rewriting most/all of the code from scratch (that would explain why multicrew SRV use is now a possibility, where it wasn't before (but was promised when multicrew launched). If that's true, then we're at a new/refreshed start point where they should be able to add new features with less likely-hood of major bugs like with past Horizon updates.
So yes, I'm happy with my space legs. I do hope ship interiors come in the next few years - as soon as they figure out what to do to qualify that as "fun" in their minds. For me, the only real disappoint is exobiology. It is so boring and time consuming right now, my stance is a firm "NOPE, not going to do it."