@arma473 I believe this was tried for a patch. And for a few different varieties of submerged unit.
Other balance ideas:
~ Make it's salvo size smaller. So anti-torpedo is more effective.
~ Make it take mass to shoot, maybe even manual fire or a limited magazine. Like a torpedo TML. So it's effectiveness is partly because of supporting engis reloading it.
I like the idea of HARMs, but find them very annoying to counter. Though I must admit that is because I play Dual Gap a lot, and that has essentially the perfect naval funnel there. On other more open maps it is probably less annoying, as it's harder to mass AA around each one.