So, we have 3 weapons and 2 "free" weapon slots, why not add a 3rd free one ?(this wouldn't remove the slot upgrades)
I'm sure that this would help to get more bombers, let me explain what new players think:
Sword=main source of damage
Gun=very useful for switches or when you need to have range
Bomb=ok, could be useful, but i need my sword and i need the gun so i don't have space for it.
An other good thing would be to add the old missions back(the securing the camp, where you had to use the bomb and the 2 other levels that were removed with the battlesprite update)
Pure bombers are viable. Switches can be activated with vials and pots (there's always one around)
Alterntively, you can also use a sword and a bomb with no gun. Pick DA/GF and spam charge attacks.
You also play in parties. You might not be able to easily hit a turret or switch, but your teammates can.
Seriously, I insisit, you don't need a sword or a gun.