In light of requests like this, I personally hope they include Chrome rocket nozzle attachments and extenders on future released ships, especially ones that are actually retro models like the Krait.
The Krait could have reaaaallly long nozzle extensions that split into multiple ones. It could also come with a reaaaallly big bored version. Both would make it much louder (inside your cockpit and Stations only though cos space), and add an extra 15m/s speed!
They also double up as a weapon, if someone interdicts you (or not), as you boost infront of them they're knocked off angle by 80° due to the sheer thruster force being directed behind them for x distance. (why isn't this actually a thing?)
As an added bonus, if you boost passed a ship in a station, you'd have a chance to reboot/reset their ship's systems.
We should also have the option to turn any size 3 or above compartment into Sub-bays, which would have twin Subwoofers and an anodized amp taking up the entirety. These would enable a hidden 'Pirate' music Channel within Galnet, where you hear stories of CMDRs interdicting low-level pilots in big ships and obliterating them in the most hilarious ways while not actually having any interest in their cargo, 'cos true Pirates yo.
Also for new Utilities, they should add Chromed and LED edge-lit spinning disks of various sizes and patterns. They'd spin faster the faster you go in NS only and would act as a defensive mechanism.
When your shields are down, they'd have a chance to deflect incoming Laser fire back at the enemy!
Multiple sized landing gear (smaller landing gear would make your 0-60m/s increase but top speed when landing gear extended would decrease. Opposite effect for oversized landing gear, except shock assistance is also decreased so landing haphazardly will damage your ship more), a variety of seating options, interior structural integrity bracing and the ability to smoke external lighting so it's less visible to other ships both in-person and on radar, are but a few other options I think should be included.