Koeman’s use of Leighton Baines (£5.5m) on the left of a four-man midfield bodes well for the left-back’s Fantasy Premier League potential.
The England player has produced 52 assists in the previous eight seasons and is likely to benefit from a more advanced berth should Koeman retain his current set-up.
Barkley, in particular, turned in a strong display, bagging the Toffees’ opener and earning maximum bonus points.
Mirallas earned the assist for his fellow midfielder’s strike and was handed corner-kick duties by the new manager.
Gerard Deulofeu (£6.5m) was fielded as the lone striker as a result of Romelu Lukaku’s (£9.0m) absence with a heel injury. The Spaniard fired three attempts, averaging an effort every 22.7 minutes, before being replaced in the second period.
With Lukaku due back imminently, though, and new signing Yannick Bolasie (£6.0m) also in contention, Koeman’s preferred formation going forward remains in question.
Encouragingly for the new manager, Everton embark on a run where they face just one of last season’s top eight in the next eight Gameweeks.
Going on Saturday’s showing, Barkley looks the most impressive performer so far. As well as producing a 10-point return, the 10.5%-owned midfielder also registered more attempts on goal (four) and created more chances (three) than any team-mate.