First off let me say that everything that your doing with this mod is great, the world generation is awesome, the mobs keep the player interested with the different appearance and i feel like that titles and aspects have loads of potential, however i do think that classes and aspects are kinda down played and need a update.

first lets start off with titles, there useless right now, and i feel like they could end up being a great aspect about this mod, giving players specific ability's that combine with there aspect but here are my ideas for them.
Heir: changes there aspect to suit them
example using the wind to double jump or dash around, using life to change mods into different mobs, or changing the time it takes to walk somewhere
maid: to make there aspect
example making blood so you can heal someone, making light so you can see, making and giving rage to increase strength.
page: using the potential of there aspect
decrease the rage within someone so they don't go berserk (get on to that). increase lights power to burn someone, increasing mind to know stuff about people mobs and machines and hidden mechanics.
Thief and Rogue : to steal aspect
example, rob light so no one can see, rob blood so that mobs start fighting each other, rob doom so mobs despawn around you.
knight: serve and protects there aspect
example go back in time so you don't die, pass through space, read peoples mind.
seer: to use there aspect to guide themselves
example seers of light are able to see everything above ground with a map, void can see everything below ground, space would allow you to see all planes (prospit,derse,overworld,nether,end and everything between)
Mage: someone who understands the aspects
example full guide on there aspect, everything, mechanics and all.
Sylph: heals using your aspect
example when in light your friends (or yourself) heal when not in combat, life can just heal when your in contact, hope would heal more as your getting damage
Witch: manipulates there aspect
example making void smaller so you can travel faster, expanding light to make a star, changing the velocity of the wind
Bard and Prince: destroys using there aspect
example destroy the wind around someone to suffocate someone, remove time so something never existed, remove life.
OK that was way too fucking long but i still got a little to say focus on little
aspects should have there own ability's that adapt to the class
alchemy should be a bit more expansive with loads of weapon that act as a base and it gets color changes with alchemist changes
when sprite are added make it so that they take the shape of what they prototype with.