Thoughts on Thermal Detonators?

I like the detonators JE has. If you mod him for some extra potency, they stick more often. It's a good way to do damage to counter toons like Fives. Besides that, I mostly use them to give a toon a debuff so 88 gets to do more damage. I agree that the fight is often over before any can detonate, however I see that as prove that they are not worthless. They offer varied tactics, depending on the speed of the toon you put them on. They may kill a speedy Rey before she takes another turn, or may rest on a slow toon for a long time, providing a constant bonus to 88 and toons like him (TFP?).
I do believe that detonators run you into problems if they are part of your required damage output, but I still like them the way they are.