Her DPS is quite good, not to mention her passives and her amazing Q ability, controlling a lot of ground really quickly.
Yag is still good despite the nerfs. Personally I like running the DPS build, running into the backlines and spraying poison in their faces.
In my eyes Barik is still a great point tank, since he still has the turrets and passive heals from his talents.
Most of these guys are a bit too slow at something, e.g. Jenos's healing, Vivian's gun or Strix's scope time and lack of good mobility.
Moji is just too map specific to perform well consistently, and is outclassed by the other flanks easily.