I think that adding a feature to automatically write state abbreviations would be great. At the moment all I can do is write code to do it for me but it's extremely long so for now, I have a bit of a copy-paste workaround:
$if(li(admin)="Alabama","AL")$
$if(li(admin)="Alaska","AK")$
$if(li(admin)="American Samoa","AS")$
$if(li(admin)="Arizona","AZ")$
$if(li(admin)="Arkansas","AR")$
$if(li(admin)="California","CA")$
$if(li(admin)="Colorado","CO")$
$if(li(admin)="Connecticut","CT")$
$if(li(admin)="Delaware","DE")$
$if(li(admin)="District of Columbia","DC")$
$if(li(admin)="Florida","FL")$
$if(li(admin)="Georgia","GA")$
$if(li(admin)="Guam","GU")$
$if(li(admin)="Hawaii","HI")$
$if(li(admin)="Idaho","ID")$
$if(li(admin)="Illinois","IL")$
$if(li(admin)="Indiana","IN")$
$if(li(admin)="Iowa","IA")$
$if(li(admin)="Kansas","KS")$
$if(li(admin)="Kentucky","KY")$
$if(li(admin)="Louisiana","LA")$
$if(li(admin)="Maine","ME")$
$if(li(admin)="Maryland","MD")$
$if(li(admin)="Massachusetts","MA")$
$if(li(admin)="Michigan","MI")$
$if(li(admin)="Minnesota","MN")$
$if(li(admin)="Mississippi","MS")$
$if(li(admin)="Missouri","MO")$
$if(li(admin)="Montana","MT")$
$if(li(admin)="Nebraska","NE")$
$if(li(admin)="Nevada","NV")$
$if(li(admin)="New Hampshire","NH")$
$if(li(admin)="New Jersey","NJ")$
$if(li(admin)="New Mexico","NM")$
$if(li(admin)="New York","NY")$
$if(li(admin)="North Carolina","NC")$
$if(li(admin)="North Dakota","ND")$
$if(li(admin)="Northern Mariana Islands","MP")$
$if(li(admin)="Ohio","OH")$
$if(li(admin)="Oklahoma","OK")$
$if(li(admin)="Oregon","OR")$
$if(li(admin)="Pennsylvania","PA")$
$if(li(admin)="Puerto Rico","PR")$
$if(li(admin)="Rhode Island","RI")$
$if(li(admin)="South Carolina","SC")$
$if(li(admin)="South Dakota","SD")$
$if(li(admin)="Tennessee","TN")$
$if(li(admin)="Texas","TX")$
$if(li(admin)="Utah","UT")$
$if(li(admin)="Vermont","VT")$
$if(li(admin)="Virgin Islands","VI")$
$if(li(admin)="Virginia","VA")$
$if(li(admin)="Washington","WA")$
$if(li(admin)="West Virginia","WV")$
$if(li(admin)="Wisconsin","WI")$
$if(li(admin)="Wyoming","WY")$