Consider the following:

FGO 2
>Open World gacha game
>Full 3D models (from Arcade)
>MMORPG
>Single Player mode
>Co-Op mode
>Raid mode
>PvP mode
>Guild Recruiting
>Survival Mechanics
>Crafting
>Base Building
>Farm Management
>Gardening
>Pet Rising
>Pet Battling
Also
>Character Gacha Banner
>Weapon Gacha Banner
>Craft Essence Gacha Banner
ALSO
>Action combat with direct control over the Servants during battles
>Auto Chess Mode Grail Fronts where the Servants act by themselves during battles
ALSOOOOOOO
>Evolution mechanic for Servants
>Breeding mechanic between Servants
>Transmog/Dress up mechanic for Servants
>Reliq/Gear/Equipment mechanic for Servants