Recently the engine received an update with ETC2 texture compression support, allowing to use 4x less memory on Android platform with OpenGL ES 3.0 capable devices for textures with alpha channel.
Now it's time for desktop texture compression improvement. The engine is soon going to support BC7 texture compression format available on DX11 class GPU's. BC7 is as big as DXT5/BC3, however it has superior quality when compared to it. Check it out yourself below (DXT5/BC3 on left, BC7 on right).