Actually, that is exactly the directory where I've installed the mod enabler, and through it, the mod. When I run the game, The classes do change name, and I get the new descriptions and effects for the new Combat Arts, and some of the new icons, but not all of them. The new buffs have no icon at all when I drag them to the buff wheel on the lower right corner of the screen. the Gods still have their old icons, although the new Divine Gift effects do take place when I activate them. Also, I took my character to the Winged Harbor from the Ice and Blood expansion, and all the Seraphim (in this case, Paladin, I suppose) NPCs, have disappeared.
On the character creation screen I get the new icons for the difficulty levels, the Hardcore mode and the Expert Touch mode, as well as the Light and Dark campaign icons, but the new portraits for the character classes do not appear. The mod's logo also does not replace the original logo on the title screen, and when my character speaks, I can only hear the original voices, not the Diablo ones. Some items, like the gems (Amethyst, Ruby, Emerald) also have new names, as well as the Trophies, which are now Charms.
For some reason, the mod does not appear to install fully on my game. ¿Are all the Seraphim NPCs supposed to disappear?
I just checked, and uninstalling the mod does bring back the Seraphim NPCs.
There is also no fonts directory in the mod's pak directory.