Base on my suggestion is about to add a new ability to the balloons!
Lets start with the description about Balloons. All of us know that they pilot by skeleton and have been beaten by defences during the attack, so my suggestion start exactly after beaten and falling down which depends on the level of the Balloons the pilot of it and co-pilot or co-pilots which these are skeleton on the ground start to beat a defence so close to them.
I explain for example a Balloons level 5 after beating and falling down on the ground 3 skeletons will start to beat the closest defence!
They will attack to single target together.
Their hit point will be 45 and their damage also be 24 per second.
depends on this new ability the price of balloons will change and for each level add about 200 Elixir and just increasing 20% about hit point and damage per seconds for each level upgrading. In addition this ability only add to Balloons more than level 4 and for level 6 we can have 4 skeletons!
If after the balloon fell to the ground it let out a couple skeletons it wouldn't really be a Trojan horse. You don't load the skeletons into the balloon, its just one of the spawned units. Just like the Golem or Lava Hound doesn't carry units, but still spawns units after destruction.