I am playing in the same game with RP. The reasons we are so interested in offline token editing are...
In the Hero system there are a lot of abilities, skills, powers, and equipment that use/require dice rolls. In our game if you macro-ize (is that a word) all of your available skills the total number of macros, per character can easily be more than 50.
In addition our group sometimes does one off games with differerent genres/characters. And we are also considering running two alternating campaigns of different genres (one our existing Space Opera game, and the second a Post-Apocalyptic game). By using the token macros for character dice rolls, instead of the macro buttons, it is very easy to change characters (as the macro buttons don't change between games).
In our campaigns it is common practice for us as players to edit/maintain our own characters/tokens and the attached macros. So it is important for me as a player to be able to modify my macros during the week, between games, when I expend my experience points, then load up my newly edited character token to the GM's campaign when I connect to the game. And with our group, and I am betting others as well, it is important to be able to change characters/games without having to retype all out macros.
With the new Token format and being able to save tokens with properties attached you have made a HUGE stride in accomplishing this. With only a few more tweaks in support of Hero Dice, the implementation of improvements in the import/export of token macros (already discussed in another thread), the eventual incorporation of IT into MT, and the creation of a Hero Designer Character to MT Token Macro Export Template (a project on our end to support the Hero Character creation software), we will have a superb online gaming utility that easily blows the competition away.