That doesn't seem that great. The +10% is nice but simply removing the planetary feature limit on number of districts? It sounds underwhelming.
So if I have a size 20 planet, I could build 20 energy districts? Do I not have to worry about housing anymore? I suppose it could make hive worlds very flexible (being able to change from 20 energy to 20 mineral districts. though I would think they would need to have significant reduction in district cost and build time) but to me it doesn't sound like this ascension perk is THAT much better than just a regular planet. I mean as far as I can tell, hive districts would still limit the number of resource districts you could have. Perhaps I just haven't seen it in action.