Oh wow, thanks! I think I got that Umbra or whatever it is, but somehow missed how to use it. I will check when I boot up the game next time.
No prob. Someone here said it was possible to go back to Lucis after entering chapter 9, but they were too vague about it so I too went up to Ch.14 without actually knowing how to do that and constantly trying to figure it out.
It's best to just tell how without going around in circles and hoping the person finally gets it. I didn't pay enough attention to the Umbra explanations when they appeared to me, so I though it meant going back to the past but obviously not being able to level up or get new items.. because time paradox etc.
I only got what "going back" actually meant when I read about the issue in the internets.
PS: Once you complete the game; what is the incentive to keep playing and "upleveling"? Are there like extreme foes still out there that make the exploration worth it?
Yes, there are completely new boss battles with different huge creatures as you step up your Hunter level.
Regalia F is a very good incentive as you'll access almost any spot in Lucis within moments without a loading screen. Seriously, the F-Type should've been made available mid-game and not after beating it. What a waste of an excellent idea.
Leveling up becomes quite fast if you use Umbra to go to Altissia's Maahgo restaurant, eat the "earn 2x EXP" meal, use Umbra again to go to Lucis to grind a bit during a couple of IRL hours (or in-game days), and then use Umbra to go to Altissia and use the lodging that gives you 3X EXP points. I'm using 3 Moogle Charms on Noctis on top of that too, lol.
I.e. in FFVII you could hunt the weapons that were completely optional and incredibly strong to beat. Is there anything like this in FFXV?
Different weapons are unfortunately very scarce in FFXV. I thought I'd be able to find at least a different elemental damage perk for weapons of each class, but I found no such thing an ended up using the Thunderbolt Greatsword for like 80% of the whole game.
What you do get is the chance to find more Royal Arms after you beat the game. I rarely used Royal Arms in the game (except for Armiger specials) because I never thought draining my HP during a battle would be a good idea. Even less considering I got Thunderbolt rather early in the game.