It's almost as if we built our own engine. Will they be able to drastically improve W3D's efficiency because of this? Better graphics are always nice, but AFAIK it's been putting a lot of strain on the engine and pushing it beyond what it was designed to handle (mainly with textures and particle effects), resulting in more lag, lower FPS, more crashes, etc., for people with less-than-ideal hardware, even with all of TT's previous engine-improvements. Gamma 2.0 was an example of this, while certain maps (Hourglass) have become infamous for freezes and crashes.
The other day, I reduced the number of draw calls on Hourglass by a large amount. This alone should help performance there.