"Only"??? These are significant hardware changes that have real impact on the use and performance of the Macbook Pro. I know, I'm using one right now. People act like the processor is the WHOLE computer, when in reality most wouldn't notice a generational processor upgrade in their day-to-day usage....they wouldn't commit the mid-2015 bump to 15" rMBP, practically only changing to Touch Force Trackpad and higher speed Flash Storage plus a new external video card.
Faster startups and file transfers, longer battery life, improved Open CL performance, and advanced trackpad technology are not "meh" features!