Also need to remember that the warp costs are a flat rate, no matter where you are travelling from/to, at the moment.
This will change and warping will (I’m told) eventually be based on the distance you are from your destination planet, so short hops, like jumping to the next visible planet, should be much cheaper than jumping 5 planets away (for example). This will also, of course, need to go through a certain amount of balancing and fine tuning.