[dogscoff]

Other thing that i want to see is ships sizes can be race specific, ex. a mechanics race can build bigger ships than a spiritual one.

I plan to include a "perk"-level Racial Technology trait, "Megascalar Construction" that will give the race extra ship hulls, on the large end.

...

Not -exactly- what you had in mind, but ... 8).

Well... that's exactly what he described. See also Pireates & Nomad's mod, with the "Big thinkers" trait. This feature is entirely moddable in SEIV.