The notification that the base is being captured needs to be removed. It potentially spams the chat when a player steps on/off the CP.
Perhaps, use the blip with a *beeping* color, which alternates between the color of team capturing the base and the team which holds the base. The CP capture already uses a timer, so this function can be included within.
Or, just remove any notification about the base being captured. This would make stealth capturing bases easier. I don't mind either way.