It would be nice if there was the ability to sort the plan sheets according to how they would be plotted and bound which is typically not in alphabetical order. Also would be great if there were potentially wild-cards to allow for two or three character prefixes
i.e.
C - Civil
L - Landscape
A - Architectural
ID - Interior Design
S - Structural
P - Plumbing
M - Mechanical
E - Electrical
FP - Fire Protection