I believe the race already has all it needs. It has unique pets, fluff, features, workshops, distinct differences from the other races... All we need is tiles, to fix the last remaining bugs and to balance the existing features as best as we can.
Speaking of which... heydude, how would I go fixing that reproduction bug again? Once I get it to work, I can upload the new edition
Also, you suggested removing the sterility interaction from the creature file. That means, however, that there will be cases where the Queen gets married and has kids with a drone, right? (thankfully, we will be able to fix that in the new edition with the orientation tags)
As for your suggestion, insane... maybe it would be a bit overpowered. Soldiers are quite badass. They are significantly larger than humans, they have natural armor, they can heal ligaments and tendons, they have plenty of natural weapons and that's before we count the many, many ways the player can upgrade them for even more armor, natural weapons and stats. Currently, their balancing factor is their rarity. In order to build a soldier only force, meticulous planning and care are required, otherwise the player must make do with bow wielding workers and war animals. If we allow a player to mass produce them and especially since you can have a Queen by day 1 if you want to, then after a couple of sieges and some sparring sessions the Hive would be unbeatable.