I agree, bases with bubbles should stay out of combat in all aspects. calibrating support should issue a warning that you will loose the bubble if you do so.
Kamikaze actions are still possible like that, just that are not that imbalanced anymore since you don't have that 24hrs shield and can indirectly fight with it.
The only advantage that a kamikaze sector jump should give you is the surprise moment. But not an undefeatable cluster until the bubbles drop that you can only fight back at the point your opponent chooses.