Paul S:
Paul T., I am very curious to understand why your experience shows that up to 4° forward mast rake the sail settles better when running? What do you mean, "better"? Are you referring to light winds?
On Ilvy we are reefing dead running with the sail squared out and under pressure, without any problems. Is that possible with forward rake, too?
When running in light winds, forward rake in the mast let's gravity help keep the sail out. Forward rake also can help to put the CE where it's needed when the options for the mast partners is limited for any reason. Rake is just another tool in the designers toolbox, to be used when needed.
I've never had issues reefing any of my sails on any point of sail.... sometimes you need to wait for a bit of a roll to free things up but the sail always comes down. More or less sail balance or mast rake does not seem to influence things much. Although a decent amount of sail balance does seem to make the sail more docile when gybing and it does reduce the sheet loads.
If you want the sail to come down readily, don't use a five part halyard, they are high friction devices! I only use three part halyards. If you need more power, use a winch. The Secondhand market is flooded with cheap non self tailing winches. Most of them are cheaper than what a decent set of blocks will cost you for a five part halyard.
Lastly, forward rake really meses with the minds of pointy sailors.... that adds to the pleasure of junk ownership.