The one flaw I've seen in GW2 is that certain areas have crazy lines that shoot through them, like a shattered plane.
Just downloaded the official GPTK 2.0 release (not beta) and installed it in Crossover Preview 24 (which had those shattered plane issues) and a quick run through a couple of areas with the problem showed no problem. Feels like the Crossover 24 non-Preview, which will no-doubt use GPTK 2.0, will nail GW2!
The settings I use are: D3DMetal and Msynch in Crossover,
and in GW2: Full Screen 2056x1392, Frame Limiter 60 fps, Medium animation, SMAA Low, Environment High, LOD distance Medium, Reflections None, Textures High, Render Sampling Native, Shadows Medium, Shaders Medium, Character model limit Low, Character model quality Medium, Postprocessing preset High