Thats a good point ODP is really all aout selection at least at the 1st levels. You can not really develop players in a week or two, oh you can teach them a skill or a formation, maybe a technique that they can then take home and work on. Development takes regular practice with reenforcement of good practices and correction of bad ones. You can not get that with once a month and a week a year, well not much of it. Take the fact that most of these players are well beyond basic skills and you have the need to push tactics and conditioning which IMHO also takes consistant regular training and polishing. This is where I think that ECNL can in the long run supplant ODP.
Give a good coach 3 times a week (all year) with a group of mostly equally skilled players and development will happen. At some point a gril whp was better but only getting sparadoic ODP sessions will get past by a one weaker player who spend more time training with better players and "developing".
Lastly add in the team chemistry that is such a huge factor in soccer, maybe more so than most any other youth sport, and we will see playing style from ECNL team that cobbled together team will struggle to match. I have seen teams that were less talented (fewer star players, IMHO) beat teams with more skilled players who did not have good chemistry. When a good player knows exactly what 4-5 of her teammates will do every time and then executes you get some great play.
