So far have only used the armor, the primary, the secondary, and the support weapon, against the bugs. Oddly enough I have not used any of the exosuits in the exosuit pack
Gallant: One handed smg with medium pen and insanely high rate of fire. Practically useless. The most prominent enemy with medium pen (hive guard) got buffed to heavy armor. Also, the vertical recoil is so high on the base gun, you have to aim at the floor to hit your sprays, or aim at things right in front of you. Almost impossible to aim. Also also, it deals almost no damage. One whole default clip to take down one of the new warrior strains. Might be good with extended mag and vertical grip, but I can't say. You chew through ammo like no one's business, kill 1 enemy while missing half your shots, and then get overrun and die. Maybe skill diff, idk, but there are better guns.
Bullet Storm: S-tier strategem and probably first on the nerfing block. It's 2 disposable stalwarts with 1 mag 300 bullets each on a 90ish second cooldown. Very high rate of fire but very reasonable recoil and great accuracy. It's light pen but that doesn't matter at all because of how effective it is against everything smaller than a charger. Literally my new primary. Since you get two each drop and the cooldown is so short, it can literally supply the support weapon for a whole squad, opening slots for other things. This thing is godlike against the bugs, especially against the new strain.
Missile Pistol: Literally useless. You get 4 lock on medium pen missiles. Best you can do is kill a brood commander with one hit, maybe. No reason to bring this over the grenade pistol since the splash is non existent. You can't even crack armor plates with it. Might be better against bots if it can break the bunker turrets or take out fabricators from a distance. IMO though this should be heavy pen.
Armor perk: It's good, I suppose. I felt the extra speed occasionally with the light armor and the slide distance once or twice, but I'm not sure how much a difference it made
Ah. I see. Well thats....a choice.
The last part is inaccurate: almost every terminid got their melee durable damage increased, with a few terminid ranged attacks also being buffed along with bot chaff and hulk flamers.
I'm sure I missed a few, but these buffs are meant to bring bugs on par with the other factions against mechs.
The catch is that only mechs got their health increased: turrets have always been squishy, so I guess they're fine, but the Bastion and the ~~Warthog~~ FRV were indirectly made more vulnerable against the buffed enemies.