Since we are talking about Group E, it was unlikely the Pats would have advanced via a wild card, even if they squeaked out a win against one of the other teams. They would have needed 6 points and a goal differential of at least +2 to get a wild card. They finished their bracket with a goal differential of -2. Based on their performance and league record, the team (on paper) does not have the offensive power needed to compete with the higher level teams.
In looking at the 2017 Pats DPL record they finished last in league play with a record of 1-6-2, 7GF and 17GA. See,
http://primetimesportz.bonzidev.com/sam/standings/ss/schedule.php?v=3&divisionID=MTU4MTMx. Quite frankly, the National Cup result was not surprising, unless they attempted to bring in some ringers for the National Cup run and they would have likely missed out on a wild card in any of the other brackets.
That said, the other than the class of the DPL (Legends, Real So Cal and Eagles) the other DPL teams in National Cup are struggling and not at the top of their brackets. The top DPL team for this age was the Legends FC DPL/Academy II team, which ironically plays Westside this week. So far, Westside is rolling through the competition, which is what you would expect from a strong SCDSL girls team (note, is CSL on the boys side). The Legends DPL/Academy II team tied the Spartans, whereas Westside spanked them 4-1. The other DPL teams that were stronger than the Pats DPL team, LA Premiere Academy II and LA Galaxy Academy II by their slightly better losing records, also didn't make it out of round 1.
All-in-all, it looks like most of the teams that are legitimate contenders remain in the tournament and all of the SCDSL, CSL, SDDA, and DPL teams that entered with losing league records are out.