Aurelias has opened a thread here for discussion and further FAQ updated reading.
There's been a lot of buzz about the "SA Client" that was revealed along with the expansion announcement this weekend. This post will hopefully answer some of your questions about the plan for this client.
Q. Is the SA Client a completely new client?
Yes and No. It's built on top of the existing KR technology but there will be enough changes made to make look and feel significantly different.
Q. Do you have to use the SA Client to experience the new content?
NO. All of the expansion pack content will be available for play in both clients. (Assuming you have bought the expansion)
Q. Will there be new art?
Yes and No. We hope to have the UI completely reskinned to give it a more "Stygian" feel. We also hope to touch up some of the terrain textures used in the client. For world art, our current plan is to use a mix of 2d and KR artwork (basically pick the best of the best from each). The mobs will use the art from KR.
Q. What sort of things are you planning on improving?
Leurocian already talked a little about the map improvements we've made. We are also implementing a legacy targeting mode for those who don't like the KR system. We also have a laundry list of systems we want to improve including but not limited to: sound, chat, inventory, and targeting.
Q. That's all great but what about performance and bugs?
This is our major focus. We are doing lots of things to improve performance. We have already seen considerable improvements in performance over the KR client. As for bugs, we will be spending almost half of the time allocated to work on the client specifically fixing the bugs from KR. Our number one goal is to make the new client as solid and bug free as possible.
Q. What about UI mods?
At the very least it will use the same system for modding as KR. If we have time we have some great ideas for improving the system. Existing KR mods will need to be updated to work with the new client.
Derek 'Supreem' Brinkmann
UO Lead Programmer
I have stickied the thread.