I am a longtime fan of many sci-fi space movies and anime and have some basic knowledge about astrophysics. Because of this FTL
travel or hyperspace travel in starbound always felt a little weird:

1-Stars in the background move to fast to soon (8 secs). That would suggest FTL (faster than light) even before getting 
    into hyperspace (before the flash and sound) so what’s the point of hyperspace.
2-Hyperspace flash is too short (1 sec). Maybe if it was a wormhole it would be ok but hyperspace is just traveling faster 
   than light so maybe some travels would take a second but not all.
3-Slow down after hyperspace takes too long (8 secs).Again, stars moving too fast, as we see in the movies after the 
    millennium falcon exits FTL stars stop moving in the background.
 
Changes:
1-Increased acceleration time 6 seconds so path to hyperspace is smoother.
2- Increased Hyperspace flash 3 seconds.
3-reduced slow down 3 seconds so stars move slower at arrival.
4-reduced planet arrival 2 seconds
5-reduced “enterHyperspaceAudioLeadIn” 0.2 seconds because hyperspace sound was playing after the flash.

Travel time overall increased 6 seconds.

Installation:
Just unzip into starbound's mod folder (must be in its own folder)
 
Adding your own times:
Just change the values in my file.

"flyMaxVelocity": this is the ship max speed after acceleration time ends.
"starVelocityFactor": how fast the stars in the background move, is factor of ship speed.
"speedupTimer": acceleration time, how long does it take to reach max speed.
"slowdownTimer": time it takes to stop ship after FTL.
"flashTimer": time the flash lasts.
"disembarkPath"
               "time":time it takes your ship to leave a planet.
"arrivalPath"
               "time":time it takes your ship to rotate into the planet’s orbit.