Dragon still has big points from having multiple 600 BST Pokemon bouncing around with 120+ power STABs. If Ghost had that, I'd call it the most threatening offensive type in the game hands down. In terms of matchups, it's just too good.
Overall, I'd say the offensive buffs to Ghost and to a lesser extent Dark are turning out far more important than any losses Dragon got. Dark may even have improved as a defensive type now despite gaining a weakness just because resisting Ghost is so huge.
Overall, I'd say the offensive buffs to Ghost and to a lesser extent Dark are turning out far more important than any losses Dragon got. Dark may even have improved as a defensive type now despite gaining a weakness just because resisting Ghost is so huge.