This might be petty, but I think they should be smaller. If you are trying to surprise an incoming enemy your trap shouldn’t be rather large balloon. Maybe the size of a standard trip mine.
Perhaps it could be stick as well, might be fun to place it under stairs or on loot containers.
Last thought is to have a manual activation instead of having to shoot the thing. If you are trying to secure a room with 2 floors it is pointless to have to go look at the trap shoot it and then post up. The manual activation would work really well with your team if they spot one when you are not around you can activate on their warning.
Just some thoughts. I feel as a character that needs to time or money to activate, he needs a little love.
Thanks,
