I think the jump cloning timer is too long, here is an example that happened to me:
The corp I am in has 2 bases, one highsec and one nullsec. I was mining at the nullsec base in the evening. In the morning I wanted to do the skilling spree, and because I had my PvE ship in the highsec base, I jump cloned there. I finished a combat site, but then I couldn’t jump clone back, because of the timer. That means I can’t mine at the nullsec base, if I do not risk a ship to go there.
Why is the jump clone timer SO long? Please decrease it, about a 5-hour timer would be enough.