To Thaago's point, when you look at Broadswords in a vacuum you ask yourself "why the heck does it only have 10 dissipation!?" but then you see the weapons and capacity and it makes more sense. What doesn't (immediately) make sense is why Khopesh have 100 dissipation, but then you find out they originally 2 Vulcans and a LAG before they had Annihilators. It's one of those, "it doesn't hurt anything so why change it?" type situations.
But to the point at hand, does 50 dissipation for the Warthog make sense? Going back to the accuracy issue, even under the best of circumstances, it's not landing every shot. Or to put it another way, why am I spending 12 OP for slow fighters that, once committed to the fight, only contribute the equivalent of 3 Light Mortars (6 OP) under ideal of circumstances? With some luck, they might actually output 6 Light Mortar's worth of firepower briefly.
To SafariJohn's point, when the tooltip says "2 Light Mortars", the player isn't exactly informed that really that drops to 1 Light Mortar when flux locked (which is within 2 seconds of fighting). If the fighter has weapons on it, I think it's a reasonable expectation that they're able to fully utilize them at all times. That they can't is...odd.
A couple more Warthog trials:
Assault Chaingun with 130 dissipation on each Warthog: fires 3 shots before pausing briefly to "reload" and fire again. Shots tend to be highly accurate. You're getting a single ACG split between three fighters (10 OP) so this feels close to an equal trade-off.
Thumper with 2 Light Mortars and 120 dissipation and 400 capacity. Thumper uses all 400 flux on approach and then Light Mortars kick in. Since dissipation is slightly above the 2 Light Mortar's output, it eventually gets back to 0 and the Thumper fires again. Depending on positioning, there's a 5-10 second delay between Thumper barrages. Gives some burst damage and additional range. It's also visually distinct but it absolutely murders low armored targets.
For 12 OP, how powerful should Warthogs be?