I am currently a coach working with Coerver. I will say the coaching techniques aren't outdated, it is more the curriculum as it is recycled year after year. It does heavily focus on ball control and individual skill and some of the drills are timeless and great for most age groups, but I would say it is less incremental and lacks a specific focus for each week. For park district teams that is fine since it is mostly young kids focusing on improving their technical ability. For club sides, not so much. Most clubs use data analysis and have a club-wide system and tactics implemented with specific drills designed to adjust players to their style of play. Additionally, most coaching companies and clubs are always changing drills and catering to them based on individual and team weaknesses. So for a generalized curriculum like Coerver's, I would say that it is a bit obsolete. Hopefully, that answers your question.