Goalkeeper Bernd Leno joined the North London outfit from Bundesliga outfit Bayer Leverkusen in the last transfer window.
Alex Iwobi has been rated as Arsenal's best player in the Europa League tie against FC Vorskla at the Emirates on Thursday evening.
"When you start the pre-season, you have 25 players and you need passion with every player, and above all with the young players or the new players", Emery told reporters.
"I think the first 60 minutes were good, with us imposing our ideas against them and also, little by little in the match, winning battles on the pitch to be near to scoring", said the former Sevilla boss, who celebrated his 32nd win in the Europa League.
"We have started playing with our style with Aubameyang", Emery said.
"You were wondering why I have problems with you, why I don't want to come and play for the national team", Aubameyang wrote on Instagram referring to the Gabon federation. I will work hard every day to play more games.
"It is a little bit more risky to play because we don't want to kick the ball up front", he added.
"Our disappointment is that there were two goals conceded".
"Also, then we have the possibility to give them chances to continue improving and show their performance with this passion and look at each performance in each match or in training here at Colney". We push each other and I think the competition with us is very good.
"Each match is different". While Emery was happy with the overall performance from his players, he was clearly frustrated with the late defensive lapses - especially after conceding an injury-time goal at Newcastle last weekend as well.
We'll face an Everton side who've won just one of their five games so far this campaign and lost 3-1 at home to West ham last time out so this is a good opportunity to register our fifth successive win in all competitions.