The most difficult thing is that this is a good upgrade and we just don't know what the next update will bring aside from Skylake.
I got this one as I wanted to get a MBP that still had the keyboard that wasn't like the MacBook's, and I was worried with Skylake that Apple would ditch the dGPUs, (I doubt they will, but you never know with Apple, lol.) I personally think since your MacBook's warranty is running out, you maybe should upgrade to the 2015 (but try to use a student discount or something.) if not then find a good deal on the Mid-2014 at Apple's refurbished store. That'll save you a couple hundred dollars.
It's a hard choice right now... curses to Apple and Intel!
K.