The Baa Baas won 52-21, their biggest win of the game, despite playing 44 minutes with 14 men after Will Skelton was shown a red card for a hit on Patrick Schickerling, who failed his HIA after the incident.
That leaves Jones with plenty to consider ahead of a summer tour of Australia, with the first match of the three-Test series taking place in Perth on July 2. England name their squad for the tour on Monday.
The hosts were without some of their first-choice stars for the Barbarians clash, including those involved in Leicester’s Premiership final win over Saracens on Saturday.
England were well below par, particularly in the second half, although Jones insists his inexperienced players will learn a lot from their minutes against a strong Baa Baas side.
“We’re disappointed with the result, you never like to be beaten by a score like that,” Jones said.
“We tried to do some things differently today to test ourselves, we weren’t good enough to execute it. There are a number of guys playing their first senior game and some guys playing their first. senior game for a long time, so we will be better for it.
“There’s a big gap between club level and international rugby, some guys experienced that today.”
There was a strong French feel to the Barbarians squad, coached by Fabien Galthie and including Damian Penaud, Charles Ollivon and Virimi Vakatawa in their ranks. Shaun Edwards joked before the game that he was the first defensive coach the Baa Baas had ever had.
Jones underscored the strength of the opposition as he reflected on the defeat, believing his side faced a more motivated side than in previous Barbarians matches.
“They were all playing for a French place, so it was a different kind of Barbarians game,” Jones said.
“They were tough on the ball, a young referee allowed them to stay on the ball a bit more. We weren’t good enough for that.