My biggest gripe with the changes in EO2U weren't the mechanical changes, extra classes, grimoires, etc. It was the fact that the labyrinth itself was nothing alike (take a look at the difference between these floor 6 maps:
https://gamefaqs.gamespot.com/ds/943642-etrian-odyssey-ii-heroes-of-lagaard/map/5350-06f-dungeon-map

https://gamefaqs.gamespot.com/3ds/826296-etrian-odyssey-2-untold-the-fafnir-knight/map/11961-yggdrasil-labyrinth-06f

combat mechanics and stuff were also re-tuned. I'm interested in this game if it's more like the original than the remake. Anyone know which it follows?