By consuming the essence of the Titan Shifter, you gain several boons:
*The power of the Titans from Attack on Titan. You may manifest your own titan form at will. It can be all the way up to the size of a Colossus Titan at first (60 meters tall). You may summon this form without self-injury, and you have a strong regenerative factor.
*Like the Founding Titan, you have the ability to create and control other titans. You can create pure titans through sheer force of will, without using live humans. These titans are animalistic and may or may not try to eat humans they find. Humans, whom you do turn to titans, you have the option to make into fellow titan shifters like yourself; these can possess a special ability, or be along the lines of a normal titan in capability if you prefer.
*You don't have the special abilities of the other Titans like the armored Titan, Colossus Titan, etc. What you have is the capability to control and develop the creation of abilities of Titans like these Titans, and even ones never seen before. You can also control the exact forms Titans take, and improve on their base attributes with time, effort, and experience.
*The drawbacks of being a titan shifter - such as chance of absorption and reduced lifespan - are not present for you, and may be removed from other titan shifters you create.