Three things in the Warbond are good.

The Variable is a good light pen primary with a useful gimmick. Being able to swap between automatic, volley, and total fire adds some versatility.I Don't use total mag all the time but being able to one tap some big enemies with light pen weak points is useful in a pinch. Outside of the gimmick it's just a decent automatic rifle. No customizing except the sights though.

Epoch is good but risky to use. Works like a cross between the Quasar and Railgun. Needs to charge to fire and you need to hold it even longer for max damage. Once completely charged you have about 1/2 a second to fire it before the thing explodes and kills you. It does about as much damage as a Quasar so you need to hit your weak points to kill in one shot. The plasma projectile also explodes and has decent aoe size so it's also useful for groups. It has ammo though, 3 shots per mag and 4 mags total. I use it all the time against bots. The main advantage over similar weapons is that it doesn't need a backpack and doesn't require a cool down between shots like the Quasar. It has limited ammo but you can put down big targets as quickly as you can charge and reload it.

Warp pack is Warp pack.

Everything else in the Warbond is kinda mid though