I mean, anti barrier rounds do this guns job and more, i would see this as a good buff to bring it into to meta. If it is a thing about having an exotic of each, then a possible overload candidate could be trinity ghoul, and for an unstoppable weapon, maybe Jotunn?
I just want to see a bit more use out of skyburners really.
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The easiest solution is just to add a mod slot to all exotic weapons. This issue is just going to rear its ugly head again with whatever weapon mods they introduce in the next season pass.