Been a while since anyone posted here..
I'm gonna start by saying that i don't know how you did it, but CC now works great in OpenGL mode. It looks great, there are no bugs, etc. Unfortunately, however, it's a giant performance hog which makes battles lag quite a lot. I run an Oneplus One which can handle it quite well but it's still far from being enjoyable (also I always prefer 0% lag over better graphics).
So, I switched to Software rendering mode (High defenition) which gives a massive performance boost (avg ~200fps in world mode and 60-100 in battles), BUT, makes menus illegible. It kinda looks like it squeezes the whole text into the top half of the screen when rendering, then, it tries to stretch it out across the whole screen which fails miserably. A hint towards this is the fact that the two logos, the first thing you see when you start the game, only display on the top half of the screen.
Also, if you have issues with the map not matching with where you actually can walk, turn off the "widescreen" setting.