Exactly, they are clones, it's a copy that's it, its DNA is exactly the same, that's all "clone" means. But it's not your DNA that makes you who you are, it's your individual experience that makes you who you are.
I never said otherwise. I just said that the Hive Tyrants and the Swarmlord were all individual minds within the swarm. They can create new bodies at will using the resources of the fleet, but they are still each of their own mind. Meaning there is only one Swarmlord, and it transcends Hive Fleets rather than being bound to a single fleet as other tyrants appear to be.
The Swarmlord appeared on Macragge early in the battle, just after the initial blows. What stress was the Hive Mind under then? What caused the Hive Mind to look at Marnius and go "OH MY GORD". Macragge would have been a huge pay off for the swarm and the Hive Mind sent the Swarmlord down early to ensure that the job was done.
The Swarmlord appeared because Maccragge was the first true resistance this galaxy was able to offer. By this stage the Imperium had realized there was a genuine new threat and acted accordingly. The space strategy was sound, and the Swarmlord was not needed elsewhere at this point either. It made perfect sense for the Swarmlord to be at Maccragge, but in more recent invasions it has had to prioritize.
BTW, intelligence is something all synapse creatures have, it's just the Swarmlord has much more.
This is not necessarily true. While all synapse creatures are indeed capable of channeling the Hive Mind's will, there are varying degrees of intelligence and autonomy. Warriors for example have a weaker influence, hence why they operate in large broods. A tyrant is stronger, and the Swarmlord is stronger still.