Right now, it seems the game wants you to keep getting a bigger and bigger ship. It seems that the jump cool down really penalizes you for doing this however.
For example it takes 90 seconds to cool down from jumping 1 sector or 10. So, early game if I had a bunch of unexplored sectors adjacent to me I could just easily visit them. Now I have to wait 90 second to travel whether the distance is 1 sector or 10. Which kind of sucks when I am exploring yellow dots on the map looking for hidden things, and I have to sit there doing nothing. Its kind of bad gameplay to sit around waiting for no reason. It makes me want to play something else.
I would suggest making the cool downtime relative to your full jump range. So if you can travel 10 sectors and your cool down is 90, then 1 sector should only be 9 seconds.