So let's look at the argument of energy consumption. If it takes that much energy for a ship to do a jump (normal in-system or node), how can they immediately then open up with their beam weapons as soon as their out? Or right up to the point of jumping? You would think if it takes that much energy to make a jump, that it would take time for weapons to charge after a jump. If beams and whatnot run on a different power source as the engines, I would think you'd want your weapons to be offline as you're jumping for safety reasons.
In regards to running to a node, you'd notice that ships jump out a few thousand klicks from a node and start to chug away there. I always wondered why they didn't just jump closer to the node. If they have to wait for their engines or whatever to recharge for the long jump, at least their that much closer to the node for a quick jump out as soon as the their powered up. Can't use the argument that at least their moving targets cuz cap ships and cruisers don't move all that fast anyway so, moving or not, they're gonna get pummelled.