Larger weapon diversity in early game stages?

[Mesirez]

So far, I only managed to get up to the barrier, but it bothers me, that I never encountered any actually "big" turret or a coaxial turret. My ships usually grows faster / at least as fast in size as the turrets do, so turrets are always just those rather tiny things. It would be awesome, if we could encounter size 5+ turrets even as soon as naonite, so we had the possibility to put small numbers of big turrets on our ships, instead of plastering them with a ton of small ones. Doesn't mean, that all turrets should be larger, but it would be cool to have a choice between many small or few large turrets.

I know, you always can build custom turrets but have one "giant (custom) turret" on you ship that does the same damag as his small brothers is kind of meh.

Same goes for coax turrets. Why limit them to Ogonite+?