We are currently internally testing a change to take the Console powers off of the shared cooldown with Cannon: Rapid Fire and Cannon: Spread Volley. Instead, the consoles will have a longer (most likely 30 seconds) shared cooldown with each other.
In addition, I am cutting down the charge up time on the Overload to 2 seconds and slightly increasing the damage. It will still deal less than the Guramba's Javelin.
Finally, the Tachyon Burst is getting a bit of love as well. It will now also debuff the target's shields, causing them to suffer more damage to shields for a short time. This should make the Tachyon Burst provide a lot more utility in STFs and other endgame content.
These changes are still being tested and subject to possible change.
If only there was a test server to compliment the preview server, we could aid you by also testing.