So basically, when you want to reverse a list's indexes:
for( var/x = 1 to list.len )
l += list[-x]
list = l
And as for being able to index single characters in text strings, it would certainly cut down on the code you'd have to write. You could replace
ascii2text( text2ascii( text, x ) )or
copytext( text, x, x+1 )with a simple text[x].
Though I know it's 'low priority', it still seems a nice feature, maybe for a future release?