Another description of a stoneward is that they are amazing fighters and their surges will be for fighting (haven't seen yet). And we all know what lirin thinks of fighting. No, if Lirin is a radiant (which I highly doubt) he will have the surge of progression because in his mind you cannot kill to protect. The problem with becoming radiants is they have to have strong traits in one area, if they have a lot of traits from the different orders they just wouldn't become a radiant. If anyone is going to be a stoneward it is Rock (look at his name). He is dependable, trustworthy, stubborn and a very very good fighter (Look at his bow skills and his fight with Kaladin). If you look at Rock's cooking you can see that is not where his strength lies, his strength lies in fighting (and he enjoys it). I believe he was a 3rd son (forget which son does what) which makes him a fighter but his older brother died which make him take on the responsibilities of a second son (aka cooking). If given a little backstory and development I believe Rock could become a very strong character. It seems to me that people are drawing connections out of thin air and trying to justify so many characters becoming radiants and i have to disagree, it would be way to cliche for every somewhat important character to become a radiant. I believe that most new radiants will not come from the characters we have now (were will the squires come from). And the only reason I think ROCK will become (or is) a STONEward is because Sanderson has made so many hints towards it and the way he writes about Rock just suggests that he will become important (and who wouldn't love a giant in shard plate? with a hammer?). It would just be nice if people stop saying so and so will become a radiant, because they usually have no proof and if they do its a very flawed argument.