First half feels almost like a different movie from the second half

I watched The Lost Boys last night either for the first time, or for the first time since I was a child. I would swear that I watched it as a kid but, watching it last night, none of it at all felt familiar.

The movie was fun and also functions as an interesting time capsule of the actors, fashions, music and film conventions that were in vogue in the late 80s. At 97 minutes I also think it's just about the right length, and doesn't wear out its welcome or stretch its premise too thin.

That said, I feel like a certain kind of film is set up in the first half of the movie but then, in the back half, it shifts and kind of becomes something else. For instance, while there is humor in the first half, much more time is focused on David and his crew of vampires and the COOL of everything. In the back half though, at least until the finale, the titular Lost Boys nearly disappear--and along with them the sense sense of "cool" of the film's world--while the humor is ramped up and Sam and the Frog Bros come the prominence in the plot.

While I did enjoy the film as a whole, I would've liked to have seen a film with more of the attitude and style of the first half, and more scenes with David and his crew of blood-sucking misfits.

Did anyone else also feel this way?