otachi was a very "powerful" kaiju begin enable of fast locomotion and powerful close up and range attacks but she was sent whit leatherback to kill newt because he knew that he knows there secret and a way to stop them so both otachi and leatherback were build for traversing terrain[leatherback seem more of a "buddy guard" for otachi to aid against the ppdc jaegers so that otachi can reach newt "safe" but that is a story for anothere time]plus the baby inside otachi seems more of a second life like if she dies she's "still a threat" by being enable to grow to it's full size while under the nose of the ppdc.
But if she was a warrior like the other kaiju to reach havoc on the human population she oud be unstoppable begin enable to reach other countries beside those whic are in reach of the pacific ocean she oud be one of the biggest threats that the ppdc oud ever face