I personally won't mind a flip screen feature. But it does take away from the "heavydutiness" of the body.
Just another thing that could break. There would be an equal population of shooters that would welcome it IMHO.
Bodies: Canon 6D, 70D, T2i gripped, EOS 5, EOS 100, EOS M
Lenses:EF 24-105 F4L, EF 70-200 F2.8L mkII, EF 100 F2.8L, EF 50 F1.8, EF-S 18-55mm, EF 28-80 USM, EF-M 22, Rokinon 8mm HD Fisheye, M adapter
Other : 540EZ, 320EX, 430EX II, Yongnuo triggers & strobist stuff