Real life Humans have been capable of ethics/morality and abstract thought for a long while now, but even a cursory study of history will quickly reveal that it's done little to curb our inherent savagery - though it may be very difficult to see that given our privileged western lifestyle, a lifestyle that is mostly absent of the desperation that encourages that latent savagery. It is in the lore that the losing male in a Seeker duel for Nunh status may not survive the event, such a thing would widely be considered extremely barbaric and cruel to a real world modern mind, but not so much to a race like the Miqo'te.
However, we do have to realize that this is a fantasy setting, and what SE wants to portray may not necessarily 100% align with well thought out biology based extrapolation. The U' tribe we see in game seems to sit well with most of what OP wrote, though I'd be very surprised if SE ever touched the idea that a fresh Nunh might enact a culling of the old Nunh's cubs.
And again, none of this is a hard guideline for how you should play /your/ Miqo'te character. OP stated this as well, and it seems this is reflected in game. The Valentione quests portrayed a Keeper of the Moon female who was at one point willing to marry a Hyur male. So no one is wrong for playing a Miqo'te that doesn't follow tribal habits of promiscuity (unverified but likely given that it's the only model we have that makes sense) or harem keeping.
Now if only SE would show us a Keeper tribe in game so that we could do more than speculate and consider tiny tidbits like the fact that Keepers also have breeding males or at least show us a single Keeper male other than the CoeurlClaw King from that fate in the South Shroud...
However, we do have to realize that this is a fantasy setting, and what SE wants to portray may not necessarily 100% align with well thought out biology based extrapolation. The U' tribe we see in game seems to sit well with most of what OP wrote, though I'd be very surprised if SE ever touched the idea that a fresh Nunh might enact a culling of the old Nunh's cubs.
And again, none of this is a hard guideline for how you should play /your/ Miqo'te character. OP stated this as well, and it seems this is reflected in game. The Valentione quests portrayed a Keeper of the Moon female who was at one point willing to marry a Hyur male. So no one is wrong for playing a Miqo'te that doesn't follow tribal habits of promiscuity (unverified but likely given that it's the only model we have that makes sense) or harem keeping.
Now if only SE would show us a Keeper tribe in game so that we could do more than speculate and consider tiny tidbits like the fact that Keepers also have breeding males or at least show us a single Keeper male other than the CoeurlClaw King from that fate in the South Shroud...