I think there would be value in are the tries scored in the middle third of the field, or left edge, right edge... Probably also worth knowing if they came from kicks, or through the hands, and also from where the set of six started, and where the play that led to the try started (e.g. if the set of six started on halfway, but the tackle that led to the try was on the 10 metre line - could be some value in knowing that) - sometimes the stats would coincide (e.g. Hurrell's intercept), sometimes they wouldn't... Oh, and if it's a try scored from dummy half or not (I hate conceding tries from dummy half).
I'd be happy to help out with recording the info too depending on what's needed. There's no need to lump all of the information gathering on one person. We all benefit from the stats...