what Rishoo said + retaking shocks may not be as good as post-plant shocks, where sova can really shine.
there are many many lineups with sova, and you can always rely on sova to at least have the shock darts hit (if they lineups are good) since killjoy mollys/her kit is easily destroyed by spam. plus, kay/o molly and sova shock darts can add more stall while not risking any peeks.
fade cannot do that, however, with her "sucky thing" you can combo it with sova shocks or sova ult for kills. the post plant potential for sova is incredible, alongside his potential to kill someone taking orb or wallbang on ascent B with an odin, fade can do the same thing without the reliability of the stall potential/plant denial and a consistent information getting device (drone)