No, the Borg shield is more then fine, its actually extremly sturdy when you have the set equiped.
You're quite right! It's been a very long time since a Regenerative Shield was actually useful on an Escort class ship but I am quite happy with the current version on Tribble. After an hour of Borg encounters today and trying multiple configurations. I can say the Borg Regenerative Shield really makes choosing between that and Covariant X Cap X3's quite tough.
They're still in testing, under going some final tweaks. It's possible they might come out with Thursday's patch, or they might stay in testing another weekend. Cryptic hasn't said yet. These bonus items are a new thing and Cryptic needs to take the time to get it right - better to tweak it before release then nerf 2 weeks after it's out.
hey bro how would i get those aeigis sheilds in tribble are those part of the task force missions rewards or is that a whole other thing? please lemme know i have my eyes on those aeigis sheilds and kit.