There aren't any interface changes as far as i can tell. I think you already have the one change I have noticed, you can pan and zoom with the mouse in drafting. i think most of the changes have to do with fixing bugs and making it easier to transition to NX.
If you are looking to migrate from I-DEAS to NX, I can say it looks pretty promising. I have used the CMM in Native mode (no teamcenter installation, just reads out of the TDM and outputs NX files). All of what i tried so far has almost been 100% perfect, and what little things that did come up were not an issue. Also all of was i migrated was parts, assemblies and drawing of pretty prismatic parts.