I haven't heard of any except continuing improvement on the solpart menu, the ability to separate the solpmart menu completely and use a third party menu which will also manage the modules - therefore eliminating the need for the solpart JS file (Actually I should double check that - I think that's what was going on, but whether it was actually finished, I'm not sure)
Also, I've only just installed 3.2.0 to test - there have been last minute changes.
I'm setting up a virtual environment so I can test on aspnet2 & DNN4 but to date, I've not installed that.
I can't see anything atm.
On my blogs on Friday I explained about howo to package containers and skins together in one install. In my XDMediaMadness theme I have for sale on my site, I have packaged 60 skins in one single folder as I, like you, believe you can have a nightmare happening if you have lots of them installed.
Hope this gives an insight.
Nina Meiers