Will's version was funny but it wasn't a full out comedy. Just like alot of eddie murphy's early movies like boomrang weren't full on spoof comedies, it was just eddie that was funny in an otherwise serious plot.
But when they do these reboots they forget that and make it a completely different tone.
Think about Ghostbusters, the movie was hilarious and bill murray brought alot of humor. But everyone else pretty much played it straight.
The remake with women made everyone a damn comedian.
This one looks like it's going to make the same mistake. Will may have been funny, but Tommy Lee Jones told zero jokes and played it straight. so did the rest of the characters outside of some of the aliens (the pug and the sort aliens).
That's the problem with humor in movies in general these days, it's like everyone has taken their cue from Scary Movie 1 and 2 where everyone in the whole cast is a comedian. It used to be just one person was responsible for the jokes (aka the comic relief) everyone else was straight. There no such thing as comic relief anymore. They just try to make everyone funny and it never works. Imagine watching a Skooby Doo cartoon and everybody acted like Shaggy?