For the first time ever, in order to get a zone meta achievement, people are required to get achievements from ten man instanced content. Anet apparently believes that this will encourage people to try raids. My opinion is this will drive more people from the game than get more people to the content Anet wants us to play. It's too heavy handed. It's not a good enough encouragement.
In fact, zone metas have ever been the purview of casual players, who were probably the main people that played Living Story content and stayed in those zones. By adding Strike Missions to the requirement for getting the zone meta Anet has only made me less interested in doing the zone and I find myself wondering why I should go get achievements in there, if I don't want to do strike missions in the first place.
Raiders keep saying raids don't affect people who don't do them. This proves them wrong. This content has been changed to "encourage" people to get into raids. It encourages me to play less.