it's moreso the units used with it than the lobster tbh. scallops needed a nerf for a long time because of what would of been a efficient counter gets laughed at when combined with lobsters, meaning, if both units were in close proxy one severely outdoes the other.
an example: a single siren VS 2 scallops+a single lobster, at equal cost, scallops would outdo them quite easily with their weakness of range being circumvented through lobsters. the 3 second reload and the laughable direct damage the siren does, although AoE and push-able when used in water, the scallops have probably fragged the thing before it can fire again, and even if it did, it wouldn't be enough!