I think the Actim and other statistical databases can be useful, but need to be used in tandem with common sense.
I heard that Roy was becoming very reliant on technology such as this:
http://www.soccerperformance.org/spe...nalsystems.htm
This sort of thing can lead to the exclusion of players like Andy Reid, who will be shown on the tracking system to be doing less tracking back, tackling, etc.
Systems like those don't really detect guile and creativity too well. Instead of a penetrating ball that the defender just managed to get to, it's counted as a giveaway, for example.