Tongo
Journeyman Pro
I think you may well find that his continued exclusion may have more to do with relationships within the team than his recent problems with substances.
It's supposed to be an elite professional sports team, not a playground. I played in a team for ten years and there was a couple of people who were complete tools but we muddled through. And i'm sure i've read on more than one occasion that Adam Gilchrist and Shane Warne never got on whilst Warne and Steve Waugh's relationship apparently never recovered from when Warne was dropped in the Caribbean in 1999. Imagine if Morgan had had to play in a team with difficult players like Botham or Boycott or someone like Shoaib Akhtar.
As i said, the continued decision to exclude him will ultimately be judged on whether England win the T20 World Cup or not.