I'm sorry to hear about the lag. Further optimisation will be a priority in upcoming updates as well!
I very much like the idea of a shield.
So, to narrow it down, I plan on combining the difficulty of a Soul's game with the stylish aspects of the NieR series. Combining them both to create a unique combat system.
I plan on adding shield bashes, parries, air attacks, dash attacks, dive attacks and much more.
Please stay tuned!