Just popped XV back in for about 2 hours, one of the two times since I beat it in December.
I honestly hate the open world in this game. There's nothing interesting to see, none of the NPC's are interesting, and quite honestly I got tired of the shallow chatter between the guys really quickly. World is also empty too hence the random dropships and random daemons at night to fill the void. The map when trying to use the car also straight-up doesn't work and is buggy as hell. I'm surprised this hasn't been fixed. I hate how hunts are usually 1 mile or more away, meaning it's either using a chocobo for 5 minutes, staring at a loading screen, or using the car. The car sucks. Traveling in this game is a pain in the ass. The only quality optional content are the optional dungeons. I liked the one or two optional army bases as well.
The combat can be fun... if I could see what's going on, which is like 10% of the time. There's potential quality stuff in here. Even if the camera wasn't total ass I'd still have some issues with it (such as lack of techniques and control over party member AI) but I would definitely be a fan of the combat.
I honestly enjoy running around the Chapter 14 area and fighting mobs there rather than completing dull errands in Lucis. Beautiful environment, beautiful music, cool enemies, and it's a story location.
If they're going to continue with open worlds I really hope they actually make it fun to traverse, there's a wide variety of locations, and they don't completely sacrifice the story (and the cutscene budget) to make it possible.