i dont disagree, people still camp with explosive like nade mine and molotov regardless which are also aoe and also do more damage than rockets.
like said though the rockets cant be held, once u start charging them they fire no matter what when all 3? rockets r charged. u would need time to charge the rockets and then ensure the person engaging u or actually around the corner to put them to use. a lot less camp efficient than nades/molotovs which can just be thrown and do damage.
also because of this if the rockets shoot when youre camping behind a wall the maps usually played here are small corridors so you end up damaging urself or wasting ur ammo
i do think that having more damage on first rocket than other 2 is good idea if this is too strong so they still capable of damage but not one shotting people (which i dont think should).
could test it on test server