As I've mentioned in the past, I never hide power pins these days. I've found one nice feature in Pulsonix is that, if you create the part with various "power"-type pins and call them, e.g., +3.3V, when you place the part it'll ask you what net you'd like to hook up all those "power" pins to. You get a drop-down box of all the global nets you have running around (with +3.3V selected as the default), so you can then easily select +3.5V and it changes all the power pins for you accordingly.
I still often prefer just hooking up power pins "manually" (just directly to a
+3.3V or whatever "terminal" part), but this approach strikes me as a pretty good shot at making power connections reasonably automatic "again" as it was in the 99% +5V-only digital days.---Joel