I think her barrier is probably fine. There are a lot of opportunity costs to really maximize it (build health, build armor/shield, build cooldown, or build damage?) Captain Lorelai often needs to skip things like Atlas (which might be useful when whatever flavor of the month dive hero is showing her extra attention) because she needs bonus health. Then there is the empowerment mechanic: does she put her pools where she can stand in them? Or does she put them where they inhibit the enemy?
Same with her carry path: she needs to make a lot of choices to get the best use out of her barrier. Her carry path has much weaker CC, so she doesn’t lose as much by standing in her puddles instead of putting them on the enemy is a lot more likely, but she also isn’t likely to build to get the maximum barrier. Do you build Capacitor Plate for the barrier, Aegis for the Reflex Block, or Slumbering Husk? Do you give your barrier to teammates, or save it for yourself when you get dived on? Since carry builds need more damage, she needs to make harder choices about building health.
There are best ways to play and build her, but not everyone is going to get the best out of it every time.
Her CP empowerment ratios might need tuning, but they are probably fine at lower levels. Captain Lorelai doesn’t have much utility in early game, so pressuring the enemy with damage is her utility, and she’s not the only carry with a strong early game. So if her CP empowerment were nerfed, I’d rather see it after the first level of her B.