I really think this is going in the wrong direction.
Quick Travel never costed before, why now? Unless you're charging MAYBE taxi prices where they're located.
Travel to Strongholds costing? This doesn't seem to be right, we already spent quite a bit of money on the SH, now you want to charge for using it? Maybe a limiting of options where the SH can go might help. For example you can go there, but can't go back to the planet you were on (save for starter planets).
Repair Costs being higher is fine, as long as you balance that out with grey loot.
Some of these are the WRONG kind of credit sinks. You're just going to drive people from the game or limited their time to the SH (which limits interaction). How about more charge on GTN items, or more for unlocks or or SH .outfit unlocks.