My boat doesn't luff either. I find that raising the sail is very quick, especially using the two line system where the spin is already partially out of the chute before rounding the mark. Although obviously you still have to turn down off the wind to raise for much longer than a 2-up boat. But I think it is lowering the spin that soaks up the most and loss of speed. Also, this is where you have to steer a little bit, because you have the mark rounding as a target, where at the top mark you have an open course. If I get it right I'll sheet in the main to round the mark without using the rudder, more complicated if gybing round as well.

So, I don't think the pump up system will help all that much, what you need is a kind of spring loaded retrieval system!

For the same reasons I can't see how a furler will help that much, it's still going to take a couple of operations to stow away the sail (furl and then retrieve). But I guess it could allow you to carry the sail right to the mark though, so worth investigating if someone has the time.