Thanks for posting about CS5. I assume that you mean Photoshop (which is the only part of the suite that I have)? I had to install Java 6 to get it to run in Yosemite so that's no problem re-installing for EC.
My main issue, now, is how MS Office 2008 will run. If anybody knows, please reply.
EDIT: According to Roaring Apps, Office 2008 and PS CS5 do run in EC.