I personally have not tried this new version yet, but looking at their promotional video, it seems that they have improved pretty much on the sketch mode. One drawback I realize for the previous version of SolidWorks is difficulties on creating 2D sketch, especially for the first feature. I would typically start of with creating dummy scale to approximate how big my sketch is. Other competitor, such as Autodesk Inventor, in their latest version of Inventor 2014 has come out with auto-scale feature which I think is a very useful function.
Another feature they mention on their promotional video is the ability to use table for pattern, which gives flexibility to customize your pattern. Even this is a great feature, I wouldnt call this a revolutionary things as other software such as Pro/E (which is called Creo now) already has this feature from quite some times ago, though it is not that easy to use!
On a personal view, I believe that the 2015 version will improve overall user experience without losing their main ace, the user friendliness. Contrary to earlier version, this version will also give option to more advance user to create their 3D model using more complex feature. If you are interested to participate to get the trial version, visit their main website and just express your interest!
