Without even coming to this thread I was about to say the same thing, extremely short and plot not developed enough. Especially after, the last one, "Scooby and Cyclops, Too" which felt like a lot of elements were crammed up in 10 mins. Also, I was gonna be so annoyed after hearing there was gonna be another monkey man-sort of monster, the fourth in this series, but I actually liked his design. I also liked the setting and the dog as a supporting character. Also Daphne was so smart at thinking about uranium after the picture was not developing.
If any writer, producer etc. comes across this, MAKE A HEX GIRLS SPIN-OFF SERIES!!!