I'm currently rolling with a Paragon and four Ventures to handle the support side of things, which means 30 missiles per volley when they're all deployed. It's really quite effective against larger targets, for reasons stated, but I would agree that a two-stage system to speed them up a bit initially would be neat, as the faster ships or the Paragon's four WTFBBQTachyons often destroy medium sized ships first. To balance things, perhaps they should be incapable of detonating in the first stage, dealing pathetic amounts of kinetic damage instead, so they're limited entirely to long range support.
Still, it does seem that no changes are really necessary. They serve a valuable tactical purpose in a balanced way, and their poor tracking and speed fits perfectly with the characteristic dumb spammy missile. The two-stage system would further specialize it, but it's not really needed, and it certainly doesn't need a complete buff.
