I have content that will re-invigorate game. At the same time it will reward skill over money. However, it will also drive coin sales through the roof. All you have to do is test it out for a single event. If I am right, you will see more profit but at the same time greater player participation.
You already have the tools necessary to implement this change.
All you have to do is award time tokens for the repair of a fleet of the winning fleet equal to the repair time for the fleet that was defeated.
Another words in other words, if a level 90 Fleet destroys a level 30 fleet in player versus player combat it only receives a small token, but if a small fleet defeated a larger fleet it actually covers enough repair tokens to fully repair and have some left over to gamble on another battle and continue fighting. The same should also exist for fighting basis.
The way this works is even better for two equally powered fleets that fight each other. The winner gets a free repair and the loser has to wait or pay coin. That way the loser who is less skilled must contain more tokens or coins in order to get back into combat. However the skilled player can get back in the combat immediately even if he has a level 90 fleet it would normally take 24 hours to repair this will encourage even high-level players who otherwise would not fight to fight.