Code review comment for lp:~fboucault/unity-2d/spread_limit_sizes

With further discussion, we have decided that it is best to accept this change, and see if beta testers object to the visual deterioration. The performance improvements are very beneficial on lower-end machines.

It is planned for higher-end machines that support OpenGL, a separate patch will enable live-previews of windows and by-pass this restriction completely. Or use Compiz and not use the Spread at all. TBC