And I'm sorry but a 16 minute transfer is not possibly 8x slower than you can do it yourself... 2 minutes to launch, 2 hyperspace jumps and then fly to a station and dock... I don't think so.
Most single-trip travel between two stations, max. 1-2 jumps apart, with minimal supercruise distances is around 5 min one-way. There is really no way to make this any faster as anyone who has done bulk trading will attest to due to the minimum times needed to dock/undock, clear masslock range, accelerate/decelerate in supercruise and so on. That's assuming a fast/maneuverable ship as well, the minimum times are closer to 7-8 minutes in a large cargo ship like a T9. Each additional jump adds around 1-2 minutes given FSD charge/cooldown times. In that sense a 5 min. minimum and a transfer time of 3 ly/minute (i.e., 100 minutes to cross the 300 ly bubble) is actually quite reasonable.
Take an example of a 100 ly journey. This would take around 30 minutes to transfer with the current time estimates of 3 ly/minutes. This is not actually much longer than the time it would take to cover the two-way distance yourself assuming you're flying a ship with 20 ly range per jump and making 5 jumps each way, or 10 jumps total, at 1-2 minutes/jump, that's 15 minutes of jumping, plus 5 minutes docking/undocking each ship, which in total is around 25 minutes. Having a ship transfer taking 30 minutes to transfer one-way, instead of taking 25 minutes to make the round-trip trip yourself, is a very reasonable comparison. The issue here is that if you do the math it actually works out quite well so that the transfer delay makes it slightly longer, but still comparable, to the current travel times.