I've defended Mummy's ride time a few times now & I still stand by it... its really not THAT short compared to a lot of other coasters. However, one of the things that bothers me the most, besides the underwhelming ending (wish I could've experienced the original ending)... is the unthemed tunnel of doom between the finale & load/unload platform.
Knowing Murdy helped create this ride, the unthemed tunnel is totally him... its the exact same thing as the plain black walls of nothingness for mazes at HHN.... would it really have been too much to ask for a creepy Egyptian tomb-like crypt theming? They could easily squeeze one more scene into the ride if they themed this holding area.... even if the cars have to sit there & wait for Mummy's ridiculously SLOW operations to load/unload the vehicles... having SOMETHING (theming, videoscreen effects, hangy crap, etc) in this tunnel would make a major difference.
Updating the effects is necessary, to an extant... Honestly, I'd love to see some Egyptian ruins amongst the track with a slight glow to see them, but not take away from the darkness. Give Mummy a proper ending & theme the holding tunnel... it'd really improve it.