Doesn't having a dragon automatically mean you get into "numbers break down" territory?
That was how I learned it.
In the end, anything that could really challenge the dragon would have made short work of the other two PC's and while there are workarounds for that level of power imbalance, it would probably be easier to at least avoid a skew that severe.
Siembieda still retains full creative control and I doubt he will ok radical changes to Atlantis.
And lets be honest, you can't remove slavery and the hostility towards humans from Atlantis without radically changing it and I would be very disappointed when in the Savage version of Atlantis a human could walk the streets of Atlantis without constant danger and some serious bluffing skill that he is either ultra powerful or a slave in service of something else.
Basically Atlantis is a gigantic retail store and humans are akain to dogs (more or less). Unless they are held on a leash they are considered strays and killed on sight, sold in pet shops or turned into food.
It's not
quite that bad IIRC--Atlantis is first and foremost a giant marketplace, so people who have stuff to sell generally get left alone, since the owners of the place don't want to scare off good business--the second sourcebook detailed some human or humanoid-owned venues that had enough respect or clout, or a powerful enough patron that they could generally operate unmolested. Plus, there's a lot of humanoid-designed equipment sold on the open market by the Kittani, who must be selling it to
somebody. However, humanoids are very much second-class citizens, the law will favour monsters over them if there's ever a conflict, and they should generally be looking over their shoulders to avoid getting robbed, press-ganged or generally abused. Plus, there's a lot of horrible stuff going on there, like the slavery, man-eating monsters or bloodsports. It wouldn't ever be a place PC's should feel comfortable going to, but it's survivable.
Atlantis was actually the first ever RPG sourcebook I read after the Rifts corebook, and it really blew my mind in terms of how it was presented--a place that was both wondrous and advanced, but also alien and horrifying. A super-powerful alien monster arrived on a ravaged earth and rather than conquering it, decided to
set up a trade hub there. That's weirdly brilliant.