This is how for the most part beam weapons should be vs the current way being used atm.
Many shots / little damage = Not cannon " Currently being used "
One or two shots / lots of damage = Cannon " Should be used "
http://www.youtube.com/watch?v=d734afLFPds
The current beam weapon mechanics do not reflect at all a beam user should be using. It should be much slower recharge times but much more damage.
It makes no sense firing 6 phasers at fast speeds only tickle a ship to death and that is provided you can.
The video above shows a very good example. Make sure to watch the whole thing though.