jihad, LAA only affects memory space availability. it does NOT affect RAM access to process the data ABOUT the details of each of the strikecraft, trade ships,construction frigates/frigates,cruisers AND capitals, AND all the particles that ALL the ships are throwing around. I have also found lowering the display detail settings and length of the exhaust trails helps to reduce the late game snail problem, but it is basically the computer tracking every single particle and triangle on every ship and structure that is the problem.
yes the primary aim of the optimisation project was to prevent the 2gb dump issue, but they have also done other optimising that helps the late game lag.
also you might find it helps to turn off all unnessesary processes like indexing service etc to free up a bit more processor time AND ram access slots.
harpo