Not really, though that's just my point of view.
What should be done depends on the way a weapon has been nerfed, whether its a small one, medium one, or big one, alongside the way it effects gameplay. In case its a rather big change as it means for some players that they need to refit their mech, their pilot, and try a new strategy or new weapon that can be used instead. In some people's cases this means the mods they put effort into getting are now of less use/worth, and in rarer cases the pilots too or even mechs if the players planned around the weapons.
What should've been done (in my opinion) was nerfing some parts of the weapons and then buffing other parts to make up for it, maybe even offering a heavy mod removal discount towards the mods used for these weapons. However if the weapons won't gain some buffs to offset the nerfs, the least that should be done in this case is lowering the grade instead while making upgrading the weapons cheaper.
edit: I don't agree that players should get a big compensation though, but i do think this whole situation with the weapons could've be dealt with better.
And I agree with most of those points. The rebalance could have been made without completely destorying the usefulness of the weapons. The damage should have been increased to keep the average DPS around the same. There should have been an implant removal discount so that players get an option to move their resources to other weapons if they weren't satisfied with the rebalanced weapons.
The main argument I was making was that while I see a lot of people asking for compensation for nerfed weapons, which is something I find funny because nobody ever argues for the opposite, i.e locking buffed weapons behind a paywall.
Disclaimer before someone takes any of this out of context: *I* find it hilarious. My opinion does not reflect Plarium's stance on things.