First of all, thanks to the community for such an amazing job on briging back TH to new systems ! I had some much fun playing this game when it came out and it still is fun today.
It seems to me that earthquakes in CTH are much harsher than in the vanilla game.
What I would suggest :
1-Bring back the earthquake's "pre-quake warning" that gives you a bit of time to repair or replace equipment (as it was in the original TH)
2-Nerf down the damage (some brand new, unused, machines would be destroyed in a single quake, I don't believe that was the case in vanilla TH)
Sorry if that was suggested already, I've looked around the forum but did not find this specific issue.