Shields work like this, they either help against blasters or against ion cannons, you have to choose one of them, they cannot stop both. Unless you have a multi-phased shield.

the way it looked above hoth was like a big electic surge going true the ship. (that was ion right?)

Yup, but I'm talking about lighter versions of the weapon type. Obviously the one on Hoth was "one-hit-one-kill", but fighters' ion cannons certainly won't be.

We're not talking about points for using the weapon, we're talking about points for disabling enemies with them, the way you get points for killing enemy troops.

but i dont think this is such a great idea. if you ever played bf2 inf only karkand, then you know what i mean with; "Its raining Nades!"

everyone would start trowing these nades just to get the points.
now a stealing kil - point that would be better in my eyes:p

The big mystery in my eyes is how ion cannons work. In the X-Wing series, they do normal damage to shields and then massive damage to "SYS%" integrity. When this reaches 0%, the ship is completely immobilized. Then in the Rogue Squadron series, they penetrate shields and do even more massive damage to ships' systems. But considering how woefully inaccurate the series is about nearly everything, I'd rather take that as a sign ion cannons don't work that way. In addition, the stupid "huge orb of light that needs an eternity to recharge"-approach is beyond silly - ion cannons are fired like lasers.

I say go with the X-Wing series' approach. Either way, you should have to reduce a ship's shields, if it has them, to zero before you can do any sort of damage.