Personally I'd give him the minimum of 20 games and see where we are and how things are going etc, you can't sack someone so soon into such a massive job of turning Villa around, in all honestly I still think we will finish top 6 but even if we don't, as long as we keep the faith and create stability for the players and staff, then come next summer with more spending, we will win the league.
if it takes two years in the championship to as we have heard from numerous managers change the losing and poisonous mentality at Villa Park then I'll take that.
It's not like RDM hasn't gotten teams promoted before, the guy knows what he is doing better then us, he is a champions league winning manager ffs, let's not write off his credentials, still takes some nous to beat Barcelona over two legs and Bayern Munich in the final.