We all know that everything on Earth is both underrated and overrated.
DH I think is rated just fine though. It's a decent game (are there really any bad WPCs?) but it's missing some things.
For one it's just too easy. Really easy. The game is not very challenging. This - added in with a fairly uninspired ruleset - means it gets old before too long for better players.
It also seems a little unfinished/unrefined. It's got some cool animations but the game never pauses to let you look at them. The gun/cannon doesn't seem too thought out, as it doesn't add much to the game. Seems like most WPCs have more interesting rulesets that get revealed over time - this one it's kinda what you see is what you get - start modes, chase points in modes (or don't) and take Multiball when it comes which happens pretty easily.
Artwork: I do think the game gets unfairly slammed here - next to most Stern movie licenses it's an absolute home run. Love the cabinets and colors, and the translite is cool too. Playfield art ain't the best but I don't hate it as much as others. And the game generally does an all-around good job of incorporating all of the films/eras.
And a shout out to Clint - I love his voice quotes and I think it's great that he's actually on the game. I'm sure we've all heard about how fabulous the original imposter quotes were but you gotta go with Clint.