I don't like the ICS stock theme myself.
I have tried it. I am hoping GO Launcher EX. will function under ICS.
Note it will be 4.xx as 4.03 still has issues.
I currently use SPB Shell 3D(read some recomendations for it on a Norwegian hardware forum..), which work well enough for ICS atm. Seems to lack a search function for the apps trough, wich is somewhat annoying..
About the ICS problems I have not noticed much thus far, just a graphical glitches here and there. The only major problem is that some apps don't seem able to write all the letters (particulary FireFox had some large areas where the letters where simply gone), hoewer as it works in other apps (Opera mobile works fine), i'm not sure if it is ICS or FF..
Somewhat more on topic, I guess hoping for a 4.03 version of CMS was a bit much anyway, as I suppose security stuff like CMS needs to be far more tested then the average application before an update to what seems like a somewhat major change (from android 2.x to 4.x).
(I actually wrote this on my transformer, which is why I don't have any spell check atm)