Playing as the Terrans
In the Shipyard Fleet Warp Bubbles are available in the modules section before I have researched the Warp Bubble technology.
Also, There are two levels of warp bubbles available, Advanced and Ultimate. This brings up 2 questions: 1. Should there be a "basic" version that comes before Advanced? 2. There is only 1 Warp Bubble technology but two levels of warp bubbles. To keep consistent with other modules/weapons/defenses there should be one tech per level of module.