Add a toggle in the KAL's Right Click menu that activates the Play Sequence command. It would work very similarly to the "Fairing Staged" "Decoupler: Enable Staging" and "HS Jettison Staged" toggles.
This would allow for much more nuanced launch sequences. For example, an SRB with a KAL module on it. When the SRB runs dry, staging decouples the booster and activates the KAL. After the booster is clear of the main rocket, KAL deploys its parachutes to bring it down safely.
Or a capsule could have a KAL module on it which deploys drogue chutes, waits 5 seconds, deploys main chutes, waits 2 seconds, then cuts the drogue chutes.
The possibilities here are pretty much limitless. And it's such a simple addition that I was actually surprised that it wasn't already in the game.
Also, why doesn't every part have the ability to enable and disable staging?
