Yeah Catachan is hilarious easy to fix, just flame bomb that surrounding area and salt the land so vegetation doesn't grow.
The Glow is already fucked, you'll have massive irradiated areas and no unrradiated food supply in addition to a significantly more diverse and dangerous native wild life.
But if you can get the GECKS and Sierra Madre tech before giving up you can turn the glow into a paradise with very little investment.
What Catachan would offer is just a good selection of models for your empire's playboy magazines. For the investment you put it even if it's as simple as a couple of fire bombings it just isn't worth it.
You just put containment areas on any radiated areas that kill quickly then you just bombard any large nests or areas of the things living there.
Kill all the irradiated animals and bring in your own produce from above.
Simple.
With catachan as the metrics mentioned.
It doesn't matter about the tech or anything like that.
Sustainability? Doing what you say makes it unsustainable.
Hospitality? Are you a human? We can talk.
As for inconvenience? Catacahn is a planet trying to kill you.
Again, even in the worst areas of FO, you can survive without being killed by a horrible death by a creature
Catachan ranks 10 for 10