Rob has been working on trudy-faced balloon targets.
Looks pretty cool, right? They're satisfying to shoot too.
For now they're just target practice when you first join an empty server, but eventually they could be a deployable gadget. Personally I found they really are great practice. They taught me to use the sniper rifle properly. And they're addictive! I spent a good bit of time figuring out how to best run through the level to pop the balloons in the least amount of time.
Visit the discord chat to get the experimental Unity 5 build and play with them yourself :)
And don't hesitate to post your bloon speedruns to the Intruder subreddit. Just expect fierce competition.