OK those buds don't look anywhere near done IMO but from the pics I can't be 100% sure. Those white hairs don't appear so white when harvest time arrives. Those buds look like they are still growing. Amber trichs come on gradually, just pay attention.

You don't HAVE TO cut them down, but once the buds past their period of ripeness, they lose potency.

As for the molasses, be reasonable about it. Many people flush without it because of the trace minerals like sulfur.

Some Sativas can take 14+ weeks to flower. I can't really tell with your plant. Check your room for light leaks!!! This is a HUGE factor in flowering time. 12 hours of light and 12 hours of complete darkness.