Remove the status debuffs from Mad Bomber, or at the very least remove two of them. This way they can be a sort of middle ground between Chaos and the other Demo suits.
Why don't the shards that split from the Shard Bombs explode immediately on contact with the ground instead of starting a second fuse time?
You know those saw blade fist weapons that the Ghostmane Stalkers use in Operation Crimson Hammer? I want one. It can do piercing damage, each time you do a swing it makes the saw blade sound, and the charge attack would be a boomerang effect where a large saw blade gets thrown out for a distance (about as far as a Brandish charge) and returns back to the user.
How about giving bombs the ability to plant miniaturized, short-fused versions of themselves as a single attack? Similar to how swords can attack two or three times in a row, bombs should be able to plant two or three mini-bombs in a row. Bombs are the only weapon that has to have max CTR in order to work properly, and there are times where you can't get a charge attack ready regardless of how short it is.
EDIT: Added one more thing.
I'd rather just see the Chaos set have the weaknesses doubled, or the elemental or normal defense completely removed.
Mad Bomber is pretty balanced as is.