I would like to suggest that these abilities have their base Snare and Immobilization immunity bumped up from their current 2 seconds to 4 seconds to put them more on par with other abilities such as Forward Momentum. Doing so would help provide a bit more survivability to Mag specs in PVP, and help to bring them just a bit closer to their Stam counterparts.
And, yes, I did read the Developer Comments in the 5.0.5 patch notes. But, consider what RAT does. It provides a DPS increasing Minor Buff for 12 seconds, a speed Major Buff for 4 seconds, and Snare/Immobilization removal and immunity for 4 seconds. Now, compare that with Forward Momentum, which provides a DPS increasing Major Buff for 20 seconds, a sustain Minor Buff for 20 seconds, Snare/Immobilization removal and immunity for 4 seconds. Both provide a Major and Minor buff and Snare/Immobilization immunity, but RAT has overall shorter durations across the board for all its buffs and utility. Furthermore, it is arguable that the Major Brutality provided by FM is more useful in PVP for damage than the Minor Force is (especially when Malacath is factored in). Then consider Protective Plate, which provides no Buffs, Major or Minor, but does provide 50% projectile damage reduction for 6 seconds, and Snare/Immobilization Immunity for 2 seconds.
I think it is fair to say that RAT and Protective Plate should be buffed to provide 4 seconds of Snare and Immobilization Immunity. Contrary to the notes in 5.0.5, this would not make these abilities more powerful compared to other skills. Especially when you consider that for some specs, RAT, is the only source of Snare/Immobilization Immunity without taking on vampirism (which should always be a choice, not a requirement for viability). I'm not asking for these abilities to somehow become better than the weapon abilities available to Stamina (which should be really good), but rather that the utility offered in the form of Snare/Immobilization Removal be at least on par with FM. I don't think that's too much to ask for.