Pay attention! Here are 3 videos in which IRB referee supremo Paddy O'Brien explains the rationale behind the ELVs that have so far been trialled in South Africa, Scotland, Australia and New Zealand:
I must say that Paddy makes a reasonably persuasive case for many of these proposed changes - certainly they are explained with far more clarity than I've seen in the written press. Discouraging a team from passing the ball back into its 22 and removing the corner flag from the "did he or didn't he score" equation are both eminently sensible, whilst creating an offside line at the tackle and moving the offside line back 5 metres at the scrum both look as if they might work.
However, I still think that allowing hands in the ruck and allowing mauls to be collapsed (neither of which, thank heavens, are to be adopted in the upcoming Super 14) are seriously stupid ideas, whilst I still have some reservations about allowing a team to put any number of players into a lineout (more forwards clogging up the midfield is not what anyone wants) and believe it's a cop out to allow a team who can't scrummage (ahem, Australia) to opt for free kicks instead.
I guess it's going to be a question of watch this space...