Good luck to them I say.
Just because it didn't work previously doesn't mean it won't again. The population of Kent has grown by 7.6% or 112,100 people between 2011 and 2021. The way they are building new estates and even towns it's likely it will keep on growing. Add in Brexit and the growth in non-EU freight and you have a different market than previously as well as different owners with different ideas.
Hopefully, it will do well. I know I'll be using it and most people I've spoken to down here are all for it and are hoping for a decent alternative to Gatwick or Stansted. The majority of those against it seem to be from outside Kent,