As far as I'm aware, playing tall is currently the only way to stay under your administrative cap, since no matter how many repeatables you unlock, you'll never manage to catch your Admin cap up with your Empire Sprawl (ES). This seems to be mainly due to (as far as I know) there not being any other way to increase Admin cap until we get Megacorp. I normally play as a Devouring Swarm, mainly because I've never managed to get a total victory on the game yet, fulfilling my Cassus Belli on all empires in the game. Currently, 3 things increase your ES, which is the amount of colonies you have, the amount of systems you have, and the amount of districts you have. The thing is, colonies and systems each give 2 ES, so my 81 colonies equals 162 ES and my 472 systems equals 944 ES. I think that each type of empire should have a way to increase your ES by a small amount. My idea for Hive Minds would be Hive Worlds increasing your Admin Cap by about 30 per Hive world. Out of my 81 total colonies, I probably have about 50 normal planets which are all Hive Worlds, I currently have 2447 ES, knock off the 550 ES if you took my nerf into account from earlier and round it to 1900, then if Hive worlds had +30 Admin cap, that would bring it down to 400. But we're not done there, then the rest of the heavy lifting would be done by the Admin Cap repeatable technology, 40 of those equals 600 which is what I'm one tech off of now. This would require a lot of grinding in order to keep under the Admin cap and you'd still have to be careful when building too many habitats lest you go over. Also, it's an important thing to remember that around 10-15 of my colonies aren't developed with districts, some of them are just owned planets with about 2-3 pops on them, so the ES could still go back up quite quickly if you're not careful