Sorry, I was exagerating sarcastically but forgot tone doesn't translate into text.
What I meant to say was that giving LowTech a very useful and controllable ability to chase, even limited by a cooldown, will [periodically] eliminate the advantage that Mid/HighTech has in the way of speed and maneuvreability. They survive by having the mobility to disengage when they choose. Not being able to disengage will be the difference between having a competitive edge and losing outright.
Burn Drive's current use of being able to catch up to the battle, at least, is great. It removes the problem of LowTech forever being out of range of the battle, but doesn't remove their mid-battle mobility penalty. The mobility penalty is there for a reason.
Contrary to my previous statements about Onslaught/Dominator being trash, I've since figured out some workable outfittings for Onslaught AI, at least, and effective outfits and flying strategies for pilotting both. I very much agree with the mobility penalty, otherwise they would be potentially too unbalanced. Actually, thinking on it further, I'd rescind my previous opinion that Burn Drive should have its duration significantly reduced. It's actually in a pretty good position. It allows faster ships to disengage from LowTech without being in danger of being immediately re-engaged, as Burn Drive would punish LowTech severely if it charged into the enemy fleet, or at the very least, it will ineffectively charge past its target.
IMO it would be terribly unbalanced to give a ship with that many slots for HMGs, LDMGs, and Annihilators/Torpedoes (not to mention whatever you put in the large slots) facing in the same direction a mid-battle mobility advantage. It's already dangerous enough as it is in the hands of a skilled player.