One of the things with travel in space is that space is very large which can make travel somewhat dull. I could see the upcoming Spelljammer reboot hand-wave wildspace travel with a serious speed boost for Spelljammers. Currently at 100 million miles/day, I could see a factor of 5 or 10 increase to make interplanetary travel quicker. For comparison - the squares on the right hand inner system are 200 million miles across, those on the left hand outer system are 400 million miles across.
(Digitally) Modified Planetary Display Map from my Spelljammer box
What that means practically - if we take Smoulder-space that I rolled up recently - starting off at Planet 3, the outermost of the inner planets, and heading out to the crystal sphere takes 130 days of travel, never mind wherever you are going after that. Assuming a quick 30 day jaunt to the next system, a similar flight in-system, doing a thing for a fortnight and returning, we rapidly arrive at a two year journey. That is significant travel time and with the removal of crystal spheres and the fade of deep wildspace into the Astral sea, I can see those journey times getting cut down.
While that would be a potential fix, I feel it a bit too hard of a wrench so I would suggest the following alternative: - overload your wildspace encounter dice - give planets a gravity-slingshot speed boost effect
