We discussed a few ideas on IRC today regarding the booster. Here's a summary.
1. The booster should be able to be built on walls and ceilings. It's pretty obvious.
2. Boosters should give you poison from a range instead of at contact. The range can possibly be half the healing range.
3. Let the booster enhance the regeneration of surrounding alien structures. Probably shouldn't stack.
4. Have the booster poison the attacks of hive swarms. Debatable.
5. Dragoons standing near a booster should regenerate barbs faster. Seems legit.