Anyone interested in modding deployables should first look at deployableObjects.cs as it is kind of the go-to file for a lot of stats for deployables. More can be found in engineer.cs and other files, but if you want to add in new deployables, you'll have to make sure to give it an entry in compressName and deployObject.
As for energy networks.. Don't mess with energy networks ;_;
You can still edit the hud if that's what you want. Heck, you can go back to the old one if you really wanted to (not that you should, the new one is so much better).