For the mini gun that's a star card. My issue with the regular weapons not doing enough damage.
I have found that the issue isn't really with the health but more with how unbalanced the weapons are. A lot of them just suck. The CR-2 is the clear favorite for the assault class but I don't find it OP it seems to be just right. It's just the only good weapon to use for assault.
Same issue with the heavy class I finally unlocked the TL-50 and it is clearly the best weapon for the heavy. I have been using the DC-15LE which is decent but only advantage in adds from the default weapons is slightly higher fire rate and in has attachments. Other then that it feels like that weapon needs a slight buff in damage. I don't use the FWMB-10k even though it does more damage is because the spread and fire rate for it is just awful need to be standing right in front of someone to kill them quickly
Alot of the weaker weapons just simply need to be buffed in some way with either damage, fire rate and accuracy. Especially the default weapons they are just awful to use and can't really compete with the better weapons.
I don't want to see anything get nerfed though. Alot of weapons I feel need to be buffed up. And I found the issue isn't with high health.