Will you have to stand in line with a time slot ticket? Or will it make sense to just buy general admission because I'll be in line either way?

I don't know I bought online that was pretty fast

Time slot is something like VIP. But there's always somekind of wait especially during Spring break etc. Just think of time slot being a kind of express line and it all boils down to how patient or inpatient the customers are.

I think it depends on the time of day. If you buy a time slot ticket for when they first open, you might as well just go with general admission because you WILL wait in line. If it is later in the day, it might be wise to go with the time slot ticket instead.