Concept; Making Capital Units (Leviathan, Hive Lord, Roach dragon) Alternatives to Enemy Reinforcements

So, we've seen the frustration on the big units spawning too quickly to maintain that feeling of awe and instead inspiring more frustration than enjoyment. Having a flock of roaches or a fleet of leviathans overhead doesn't feel that great most of the time.

Proposition; what if their spawning took the place of a reinforcement, with an associated audio cue to let players know? Rather than having the entire bug breach, you get a roar/screech in the distance as a roach or a Hive Lord spawns and is drawn to the enemy call in to engage as a boss fight that is supposed to draw the whole team in.

Having them be on a longer cooldown (a separate clock running alongside the reinforcement cooldown) to ensure that the Capital level units are able to take full precedence of attention and further encourage teamplay without pulling away from engaging a full reinforcement wave