For example, I'd love to define all my localization strings as variables in a single file (strings.en.kit) and then be able to use them in the parent file (and every other file that the parent imports).
I think that the default behavior should be like it is right now, when you do <!-- @import page -->, but perhaps I suggest a <!-- @importGlobal page --> or something similar (perhaps even to ONLY allow variables when doing @importGlobal...and maybe the file format is just:
$var1: value1
@var2 = value2
Or call the command @importVars or something...I'm not too worried about syntax - I just think it might be nice to have a single include for importing all variables (at least the default values).