My opinions on what is being considered here (sorry if I'm responding a bit late):
A rework of fighters and fighter commands in general would be helpful. They are very hard to use and the UI is rather clunky to use (no offense). I'd love to see them have more command options (such as orbit target, dive bomb target, escort target, patrol sector, and defend target) as well as improved UI for controlling them. Combining them into wings is also a nice idea that may help with controlling them. But I agree that they 100% need to have more speed as almost all built ships are faster.
I like the idea of changing up the engine plume/exhaust. I personally would love to see engine trails added (the faster you go the longer they are) in addition to some cool exhaust changes as was discussed in that thread. Even if they do not become customizable, a differentiation between the material tiers would be nice.
Some way to fabricate your own torpedoes instead of relying on equipment docks would be nice. I know there is a forward facing torpedo tube now, so yay for that!!
+1 for the forming fleets and being able to command them much easier. Perhaps give the ability to place them in formations and give a command to move a fleet in formation?
More sector types are always a plus for me. More variety = more playability, to an extent of course.
My personal suggestions that I'd love for the Devs to consider:
Give the ability to apply turret designs to turret blocks without having to go into the turret editor. Once you have a nice design for a turret you want to use on 20+ turret hardpoints, make there be a way to apply that design to the turret blocks you want. This will save a fair amount of time and will make building easier.
A little more variation in material tiers. With this, I am not suggesting simply adjusting the scaling even further. But I'd love to see certian materials be viable for certian blocks (similar to how trinium engines are the best to use, even over avorion engines due to their lighter weight, but same thrust output). As it stands there is no real reason (other than selling the ore) to try and mine lower tier materials, but instead push as far as possible to get avorion/ogonite as it is stronger, and produces more from a block stand point. I do like the idea of avorion still being an "endgame" material, but I would like to see other materials have their uses as well. I made a post awhile ago about this, but I'll give some examples below:
Iron: Cheap, low credit costs on all blocks, also has inertia dampener
Titanium: Titanium armor has the least weight out of any armor and has bonus resistance to energy damage. Titanium engines have a higher top speed, but lower acceleration.
Naonite: Gets armor which is very heavy (only ogonite is heavier) and has bonus resistance to plasma damage. Naonite hyperspace cores are on par with Avorion hyperspace cores performance wise, but heavier.
Trinium: Remains the lightest overall material. Trinium armor slightly heavier than titanium but gets bonus resistance to Physical damage. Trinium Engines give slightly more top speed and acceleration.
Xanion: Shield and Generator blocks on par performance wise with Avorion but heavier. Xanion armor added which has the same HP values as Xanion hull, but has extra resistance against antimatter damage.
Ogonite: Armor is the heaviest, but has a slight damage resistance bonus to every damage type except antimatter. Additional HP per armor block. Ogonite Energy containers on par with Avorion Energy Containers, but much heavier with slightly more HP.
Avorion: Shields have a slight resistance to plasma damage.
Thanks for reading!