At that point you might as well just give yourself the weapon since you're using console commands anyway.
Personally I don't mind the rarity much, even though I never really find any superweapons outside of Prism either.
I'd rather have them almost unique and keep them hilariously OP than make them easier to acquire, which would inevitably lead to the usual complaints about balance and demands to nerf them.
I did the forcemarketupdate thing after a long play session, and didn't save afterwards -- I just wanted to get a feel on how rare the superweapons were: are they really that rare or did I just keep missing them when they spawn at prism. My test indicated the former, and it seems much worse than I anticipated. I mean, 50 market updates = 50 months ~= 4 cycles, and not a single superweapon.
So yeah, at this point I have decided to just console-command myself one non-nuke superweapon when I reach max level, and not to even bother with derelicts/ruins (for purposes of getting a superweapon).
The thing is that while they're powerful, most superweapons are not "hilariously" OP (with the exception of nuke "lol I win" missile and black hole, which I haven't tried. The former's spawn rate has already been mega-nerfed btw), in the sense that most are about the same level (or slightly higher) as omega weapons in terms of power/usability, and one is actually less powerful (prism laser -- nice stats on paper, but in my experience somewhat underperforms in combat). However, they ARE ridiculously rare -- much more so than omega weapons. Which means that any ridiculous calls for a nerf is just that -- ridiculous.
What I feel the mod needs right now is a more consistent way to ensure the player gets *something* per run. Perhaps via a mission/interaction (like nex), or semi-random derelict (like ARC ships, found only around neutron stars). Maybe make it that you need to be max level before you can safely get it (or risk it blowing up, like IndEvo item events). Maybe make it a choice, pick one out of a few superweapons (non-nuke?). But as it is there is an uncomfortably high chance of not encountering any superweapon *at all* in any given run, *especially* if you run mods with weapons.