I'm sure there will be plenty of valuable posts with great information, and undoubtedly there will be others who sidetrack this post from it's original intent and flame wars will ensue, so before it gets there, welcome to the forum, great question and feel free to continue to post and engage in good conversations.
- ECNL is a great platform and can be very valuable in getting your DD the visibility she needs to make her goals a reality. A lot of contributing factors to get the most out of the platform are team's competition level, your own DD's competition level, coach connections, your DD's outreach to coaches / programs, etc. The platform works, but you also have to work the platform.
- ECNL Grind. Having a balance for your DD is easier said than done and also easier if the club she's at is flexible in partnering with her on that. If the club is flexible, a lot of the soccer / life balance will need to be planned out as best as possible and communication at all times is key, i.e. Vacations, Conflicting Academic Dates, High School Activities, Etc. Both parents / players are fearful that missing 1 practice or game will be a deal breaker with their progress and place with the coach / club. Don't dabble in fear and remove those thoughts by being upfront and asking the coach what her / his policy is on attendance / communication on conflicting commitments. My personal opinion, if the club and coach do not provide the flexibility, and you put soccer before everything else, that is a key contributor to burn out.
- Flight 1 Teams. Not playing on the ECNL platform is not a "deal breaker" as many posters will attest to, but present a different set of challenges. The path is different and sometimes will require more work on either the coach's behalf or your DD.
- Long Term Goals. You mentioned your DD aspires to play soccer in college and beyond, in most cases the level of "business" she is beginning to experience will continue throughout those endeavors. The only difference will be the gravity of that schedule which can vary by which level she plays in college, D1 / D2 / D3 and so on. If those are her goals, letting her know that what she is going through will be par for the course going forward is key in her understanding the level of stress / pressure she will be under.
My DD's experience ran the full gamut of club soccer, started at a big club and got lost in the shuffle. Moved to a small club to gain confidence and more individual attention to her needs where she flourished and then made the move back to the big club scene. Transition to an ECRL team to have more of a soccer / life balance the last few years, and continued to love the sport until this final season. Any momentum she had built up in her sophomore and junior years where snuffed out by a coaching change. She made the best of it, but silver lining was she leaned more towards switching to academics only and ended up turning down 3 offers to play college soccer. My wife and I asked her about the decision and how soccer burnout played a role. She was honest and said she wanted to play soccer on her terms as much as possible and the final year of club soured her on the possibilities of that being the case going forward into college.
She got accepted into UCLA and will be attending school there in the fall. It will cost us more than it would have been to take the soccer offers, but this is my DD's dream, not mine. Her goal was always life after soccer, and it just so happened to start sooner, 4 years, than expected. Good memories, a great journey with a lot of life experience and lessons learned.
Best of luck to your DD on her own journey, be there to support her when she needs you and give her space when she needs that as well.