So, the thing with Cabot specifically is that he can use his damage amplifier to great effect with enough competence to be able to let your assault know that damage amp is about to go up. With certain assaults, the effects can be far more than just 400 damage. Also, a single melee is not usually enough to get rid of the shield entirely in almost every situation that I am aware of, speaking from personal experience as the monster. Usually, you need to string together multiple abilities to have a chance of downing any individual, let alone one that can create a shield for around 500 (I believe that is the quantity that the support can shield for). If your medic is leaving you unattended and you aren’t properly evading monster skill attacks or maneuvering around cover elements such as pillars, rocks, or buildings, then most likely you will go down. That’s the manner of it, and part of the area of expertise that Hunters need to practice at in order to master their role.
The main issue with if you wanted to buff Cabot, and I realize that this isn’t necessarily fair to assume or base an entire series of potential buffs and such with logic like this, is that in certain Hunter compositions he would become a menace. As is, he’s one of the types of supports that favors a mid-range combat role and often needs to avoid the monster in direct confrontation. Most Hunter’s will, and should, take a strike from being focused down by the monster in a Stage One dome. The difference being how much damage you inflict on the monster back for that strike he gained.
I don’t think I directly answered your original post, unfortunately, as I am not a Dev. But they may as of yet change some of the statistics of the max shield, or the decay rate, or the cooldown of certain Supports. If it turns out that certain Hunters aren’t being played because they’re too weak, they’ll buff them. If they’re too strong, they’ll nerf them. Any host of changes could happen, inclusive of the Monsters, though admittedly there is still somewhat of a bias towards Hunter victories. At least, there was. I don’t know the numbers as of this patch.