I don't know what that other guy is crying about, but I've been to ECNL showcases before the GDA split until this year, and the fields at all the showcases I've attended have been immaculate. I don't think much has changed since you were there in 2015. I think his complaints are much ado about nothing.The fall of 2015 Phoenix Showcase was the last ECNL Showcase that my kid played in. She was U18 and they were only required to do one event that year although she did play in the Surf Thanksgiving event that year. Back when she played the fields were all immaculate for showcase events. Now there were a few individually not so good fields during league games (I remeber her playing against DeAnza Force her U14 season on a field at some park in Norcal) but most of the fields used were pretty good. She played for the Strikers for most of her club career and they probably had the worst fields of any of the 12 teams in the Southwest Conference when she played for them. Things must have changed after that with all of the competition for fields by the multitude of alphanumeric leagues.
Stay safe and socially distant. Good luck to you and your player.