Ghostbusters Premium/LE is a lot of wasted potential. I still like the game, but they HAVE TO FIX THE CODE. I like the challenging layout. I think the layout is actually amazing, especially that right ramp. There's nothing wrong with the physical design, it's just very challenging.
Honestly, Ghostbusters is a better designed machine than Star Wars, Deadpool (most valuable shot is a mistake and the right ramp sucks), and The Munsters. But the code is just holding the game back so much, and it's really dickish of Stern not to update the game, because they sold a ton of Ghostbusters machines and they really need to finish the game up. It's not just about the missing mode, there are bad bugs and scoring imbalances that really mess with the experience of the game.
If they could fix up the code, Ghostbusters would be a fine machine. It will always be difficult, but it has a lot of potential.