Originally Posted by RNAV

I'd be willing to bet that predominately accounts for how the bike felt on your ride: you were in a much less efficient position and didn't even know it. Try raising your saddle 2.5mm and see how it feels. The shorter cranks will open up your hip angle compared to the longer cranks, which means you should be able to lower your handlebars 2.5mm as well (or thereabouts).