So Episode Gladiolus imho was a complete waste of time. It was a bonus dungeon at best and while the combat had some fun moments and the bits with Cor were cool it felt like a really cheap distraction. The final battle with Gilgamesh was okay but I don't like what they did to his character. Ultimately it felt like two hours wasted for not anything nearly as cool as I was envisioning.
Episode Prompto delivers an experience closer to what I was envisioning. You have a solid main story which deals with Prompto coming to terms with his true identity and features some amazing gameplay. The shooter gameplay style actually kind of works in FFXV's game engine and the snowmobile is an absolute joy to ride every time.
The small open world chunk of the snowdrifts is a beautiful little slice of imperial territory to go through and the addition of side quests to boost your snowmobile's performance give this some lastability and replayability, especially with most sidequests pitting you in some unique challenge or facing some terrifying opponent. My favorite opponent so far was the absolutely terrifying Deathclaw who is mostly transparent except for two yellow eyes, and you fight this fiend in the middle of the night (plus the first time I encountered him I was launched into the air and landed about a mile away, no seriously there's video on my FB of that happening:
Also the final dungeon push and the final two boss fights were both great, the former being a test of all your crackshot skills and the second being an MGS style shot the thing while you run away final boss, albeit with an impressive final boss who is visually more astounding than anything we faced in the original FFXV (yes even Leviathan).
While this was an enormous improvement and got me through three solid fun filled hours, there were some things I have to point out:
1. The rewards for the sidequests seemed rather arbitrary. You can kill an insanely tough enemy like the Deathclaw and get 5 CPU or you can kill some random mobs at night and get 5 CPU. The Kaiser Behemoth awarded 10 CPU.
2. To compound that, boosting your snowmobile in the grand scheme really doesn't matter because if you want to just do the main story you can complete it very quickly and completely ignore side objectives. I'm unsure whether boosting the snowmobile helps in the final battle but all I upgraded was the damage anyways.
3. Having challenging side enemies is grand but there are two massively easy cheeses built into the game. Your unlimited ammo snowmobile SMG which you can use to dance around most of the game's mobs and the infinitely respawning weapon shacks around which most of the game's superbosses take place. The Kaiser Behemoth was absolutey a pushover because I just stayed behind cover for his ice attacks and swapped between the sniper rifle and the bazooka and took him down. I did, however, end up running form the Angelus MA-X mainly because I was getting a little tired of the missile barrages. I think that is probably the true "super boss".
4. And finally the story line is amazing and we get some great character revelations and development but I'm compelled to say it - this would have been better had it been a part of the origial game. Imagine if after chapter... what was it Chapter 11? ... we lost control of Noct and followed Prompto around on this sojourn of his. I mean to be fair FFXV religiously followed Noctis so that would have been a bit wonky from an artistic standpoint but still.
That said, it did what it had to do and was a fun distraction. I'd say it like the rest of FFXV is an 8 out of 10 experience.