Yeah active is pretty bad unless you just want to see the active posts from the last few days. Hot is pretty good primarily because of the explosion in users over the last little while.
Yes there seem to be plenty of instances that have sort by top hour/6hour/12 hour/... /all time when you visit them directly through a browser but wefwef limits it in their interface (I'm sure not intentionally).
I'm used to using various top options from reddit a lot so this pushing me to other apps that have that functionality.
Overall wefwef is a one of the most impressive web based apps I've had the pleasure of using and will likely be back if some more customizable sorting becomes available.