All of the game's unique features like guns and ships are unique, because of their niche-ness in application.
Lowering the engines would make it easier to engineer and survive on a Squid, which is often said to rely purely on its speed. Considering the massive use of Hwacha and Artemis, which will probably not decrease any time soon, I would say it is a fair buff.
The hull, I think, used to be directly next to the stairs at the spot where people now get stuck at when they want to go up. It was moved forward, away from the stairs so the hull isn't to close the opening on the side anymore. That was done, because when you went towards the hull from the helm you could repair/rebuild it from outside. Repairing stuff and mounting guns from below is one thing, but apparantly Muse doesn't like it when you can ignore physical objects in the way.
Rotating the Squid's side gun for a better bifecta has been discussed on the Forum before, in this thread if anybody is interested:
https://gunsoficarus.com/community/forum/index.php/topic,2129.msg36694.htmlAlthough that thread is old, the basic arguments still apply for today's Squid.
I like to say "Mobula OP" and I believe a Squid to be its best counter. If the side gun was angled more forward then I would change my mind.
By the way, if you don't like the Banshee on your Squid, a Light Flak inside arming time still does a decent amount of damage. If you are skilled enough you can happily sit outside arming time range and kill ships for your team. Sometimes people forget, but you don't always have to be within touching distance to do damage.
An offtopic opinion to what Gilder posted:
If you want the old Light Flack on your ship then use the Banshee. If the Light Flack didn't have arming time it would make Mortar and Banshee redundant. In the old times the Gatling's range was much larger and with the old heavy clip you would be guaranteed to hit with it. If we still had the guns of the old times then there would be even less variaty in ship loadouts than in today's competitive scene. Gatling and Flak would rule every range when it comes to killing ships.
Long range is overrated anyway. Most engagement don't even start above 1km and close range always wins, so the mid-ranged Light Flak has to deal with problems similar to any other long range gun in the game and in practise often doesn't get sniped until it is in a range where it could fulfill its purpose to its maximum potential.