Delivery was never really a concern. There is no shortage of launcher ideas (not including my own) out there.There are some pretty effective logic-based delivery methods that I've seen. One person currently has a system that can shoot multiple torpedoes a second at a velocity of close to 300m/s.
Basically, there are effective delivery methods, you guys just have to find them. :p
The real issue is that we need for the things to be able to inflict some kind of reasonable damage when they hit. Scratching the paint on a single block of armor isn't enough to make it worth anyone's while to use; neither is blowing a one meter wide hole in a 500 meter long ship. On the other hand, while effective, relying on a clipping/glitch is essentially an exploit; which will go away eventually.
The collision lag issue is another major concern. I build everything from homing weapons, to MIRVs, to full-auto launchers and after trying to bring my creations into the multi-player world, they lagged the server to pieces prompting me to jettison and destroy my 100x launcher and decommission its design.
These are the things that need to be discussed in order to come to any kind of unbiased conclusion.