And it can't be rebalanced within realistic terms either. It has gotten a lot of QoL buffs lately and it's good enough for casual play now. There's not much more that can be done within Relic's current scope of no major changes. Similar to a unit like the B4, it will just never be competitive due to its nature.
The way it was + a little extra firing time would be acceptable. Then it requires and rewards leading your enemy and the counter play would be scouting. In its current form the enemy doesn't really have to do anything to avoid getting hurt badly by it.
The enemy being able to see it long before it fires while it also being unable to track and broadcasting where it's going to fire is a recipe for hot garbage..
The only feasible change I could see to the live version as a QOL change would be to add redflares to show where it's going to shoot as a means to underline that the unit should not be used.