Good and competent? Jasper failed at everything she tried to do so far: First she got beat by Garnet, then by Lapis, then by Alexandrite as Malachite. And according to the recent leaks…..

She is alone, her only ally joined us, tired, beated, with no ships, no technology and no ways to contact Homeworld. Her rescue team has been taking care of and it is quite likely that Yellow Diamond won't be pleased once she understand Jasper has failed her mission. No matter how brutal and petty Jasper can be, if she make her brain work a little, she will understand that she has everything to gain by working with us.