I disagree on 1 with you, they are not slow but most of the time you want to fly them slow so that you recharge max energy.
Don't forget also that although small and large ships start within range 1, a huge ship for section will be at range 2-3 after placement!
I ve done mistake 2 a few times myself too!
They are slower. Sure they have to stick to halfway between range 2 and 3 if placed flushed against the edge but that extra bit of initial reach soon goes away after the first 2 turns. Huge ships don't add their base to their straight maneuvers so each straight is 1 less than its smaller counterpart. Furthermore the huge ship takes 3 banks to make a 90 degree turn where as all other ships banks only take 2. So turning those ships is even far less than regular starfighters. Also don't forget the fishtail. At the event there was a raider that hit its own Decimator (RAdm Chipry of all) and accidentally crushed it. Last tournament we had a CR-90 end up fishtailing the base off the edge but instead of destroying the huge ship we house ruled it to treating it like hitting an obstacle and the rear section took a face up damage card.
Oh, were you at Around The Table last Thursday? lol. God, what a wince, but in Chirpy's favor, if you're going to take Palpatine with you, you might as well commit suicide...