Here is my revamp of set number 70676, Lloyd's Titan Mech! This one has much more substantial changes than the Empress Mech.
I bulked up the legs, taking inspiration from Zane's Titan Mech, and replaced some of the green thigh armor with white and gold to make it flow better. I rebuilt the arms completely, adding in rocket boosters and generally armoring them up more. I kept the saw shield, but added a second blade to the sword, as well as an extra dagger. The most changes took place in the chest area, making the entire thing slightly taller and enclosing the pilot seat, while still allowing the entire front to open up and allow access to the minifigure. Finally, I tiled off the back with a much more streamlined set of wings, complete with mini boosters to compliment the arm ones.