About the high cap stuff, I wonder if the "anti-low cap" was brought into balance, specifically things like the OMD (which needs help) and the anti-starship arachnid guard post (which I'm on the fence about), and was seeded more or less as frequently as the "anti-high cap" stuff. (Not the OMD though, as it is a capturable, though I guess it's base spawn rate could go up a bit, or a somewhat less powerful but not capturable "look-alike" is made and that is given AI eye levels of spawn rate), then maybe that will help out high cap stuff in cases. Also, I wonder if something like a "core anti-starship arachnid guard post" would be a good idea, and maybe a brutal pick version of that as well. (maybe the brutal pick version could have the OMD's range).
This would hopefully make some planets and possibly even homeworlds more favorable for high-cap ships at times.
Special care should be taken to make the two spawning together very rare though. like, say, if the chance of an "anti-low" spawning on a planet is 1/4, and the "anti-high" spawning on a planet is 1/4, then the chance of both spawning together should not be 1/4 * 1/4 = 1/16 (aka, they should not be independent picks) but more like (1/4 * 1/4)^(1.5) = (1/16)^(1.5) = 1/64). Normally, I would be all for statistical independence. But given that the two together would result in much, MUCH more difficulty than the difficulty of just one of them * 2 would be, I can see a such a sharp decrease of "co-spawning" odds.
In any case, the OMD needs some serious help anyways.