So after thinking about it and fighting about it, I'm going to post my definitive opinion — not that it matters.
I voted for Instant as a "lesser of two evils" option, because I think the currently suggested delays are unreasonably punitive. What I would really
like to see, though, is a plausible delay that will still allow me the flexibility to play in a way that's a little more spontaneous than what's allowed by current game mechanics.
What I would really like to see is
both:
1. A cheap, "bulk shipping" option that roughly corresponds to the time estimates Sandro posted in the OP, or possibly longer
2. A fast, premium-priced service that hires a valet pilot to fly your ship to your current location, at speed, on demand
In my opinion, this would allow for the sort of special-use gameplay flexibility that the feature was originally designed to achieve, without breaking immersion or undermining the scale of the galaxy. I think it represents a reasonable "best of both worlds" compromise. Ultimately, I trust you to make the right decision and thank you for listening to our concerns!