I find the Ortegas character irritating because she serves no purpose other than to be the resident wiseass that Pike inexplicably allows to be such. La'an, however, is a different story. I initially didn't think I was going to like her because I assumed she was just going to be analogous to the Alara Kitaan character from The Orville (i.e. super-strong security chief), but it turned out that not only was the whole 'Khan's descendant' thing immediately thrown out the window (and one wonders why she needed to be Khan's descendant in the first place) she got a pretty good backstory and fleshing-out of her character. Ortegas is just cardboard.