I've found a temporary solution - switching the Control display to show half patches and half stomps. This is a good halfway house, letting me significantly alter a patch on the fly with no dropouts while still being able to switch quickly to other patches if I need to. I think of this as having presets 1-4 on one row, then sub-variants of each preset on the top row (ie 2, 2a, 2b, 2c, 2d etc.) Trouble is, of course, if I want to swap between 2a and 2c I have to turn 2a OFF and 2c ON, or switch patches and deal with the drop out.
A workable, probably giggable solution, but not ideal! I know L6 are aware, and it sounds like they probably will implement "scenes" at some point, but it really can't come soon enough for me.