I guess he does not. Here are the charts again.
I also have supported reduced balloon health (as well as ship specific HP like armor and hull) and reducing all modifiers to match. Currently, damage vs balloon is:
Balloon health: 1200
| Damage type | Modifier towards Balloon |
| Flechette | 1.8 |
| Impact | 1.8 |
| Fire | 1.5 |
| Explosive | 0.25 |
| Shatter | 0.2 |
| Piercing | 0.2 |
If the balloon had 75% current heath, the modifiers could be as follows.
Balloon Health: 900
| Damage type | Modifier towards Balloon |
| Flechette | 1.35 |
| Impact | 1.35 |
| Fire | 1.125 |
| Explosive | 0.19* |
| Shatter | 0.15 |
| Piercing | 0.15 |
*rounded up from .1875
The ONLY thing that would change at all gameplaywise would be that the balloon could be repaired in 25% less time. That is the opposite of 'OP'.