Hey Naiyr! Answering you is part of my work :) so don't worry about asking me any doubts.
I completely understand your concerns about the attack directions. Minifantasy assets have been used successfully in a lot of projects, but every project is a world in itself and it's true that sometimes the assets may present some challenges to fit them in your vision depending on the type of game you guys are building.
because of the really low resolution, and the relative abstraction of the Minifantasy style, most action-based games made with Minifantasy assets work just fine (there are top-down ARPG Minifantasy projects that only use the front views of the character animations that work very well and fluidly). However, I can see how it may be a problem depending on how you gonna implement your game systems.
There are some weapons and special attacks that have pure N-S-E-W directions. You can find them in these packs: Weapons, Magic And Sorcery and Magic Weapons And Effects.
I hope the assets can find their place in your project :) You know you can contact me anytime if you have further questions or if you need some directions.