Here's the Crunch, MC80 + Akbar + Home One & AFm2 and EA, gives both 6 red dice on each broadside and you can change one dice to an accuracy on any ship but Home One. Stick GT on the AFm2 and you don't have to worry too much about manoeuvring. ISD's only get 4 dice at red range and that's the more expensive ISD2. The speed is no issue as you have to close with the MC80 to kill it, send it right up the middle or up each side with the AF in front and as soon as anything is in range pound it with 12 red dice.
Yes, once the ISD is in range it can hit you with 8 dice but it will already have weathered 1 round of 6+6 red to it's 4+4 (if you have GT on it, which you will) and that 6+6 will be focused on it, where as it's 4+4 will be split between 2 targets. Hell if you stick EA on Home One as well it can roll 9 dice to the ISD's 8 at medium.
Comparing a naked MC80 to a naked ISD, yes the MC80 is worse but when are you ever going to take one without upgrades or for that matter Akbar ?