i've read some of the replies here, not all of them, too many, sorry
a lot of people seem to want dramatic changes - full flat grind, salt like tip, native like handles, compresion lock et...
well..
if you want a full flat grind - get a calypso jr
salt tip? get a salt
native like handles? well get a native of course
compression lock - para milli
the delica was my first spydie, i liked it because it was just the way it is.. slim, light, simple, i like the narrow tip, it's very handy, i like the flat grind, it gives the blade strength while leaving it thin.
any of the darmatic changes offered it would simply make it a new model, not a delica (or endura for that matter).
improvments?
small things.. bigger hole, ridges on the spine, a selection of clips for people to choose when they buy- wire, silver, black coated, other colors, to each his own, better pattern on the FRN, different colors for the FRN again, maybe a slightly larger laynard hole, since it's the best seller, a selection of steels maybe? for everyone to choose what suits them best.
those are my ideas
hope it helps..