Koeman would be a good appointment for Everton in terms of where the club currently stands.
We have regressed in the league over the last two seasons and need to get back to stabalising as a top 6/7 club with the aim of playing in europe.
The next few years will be a transitional period for the club, with hopefully major devlepment surrounding a new stadium and improving new and exisiting commercial activities. I'm sure Moshiri will look to make the 'Everton brand' greater worldwide.
Perhaps when it comes to recruiting the next manager in 3 or 4 years time we may attract the equivalents of the likes of Mourinhos, Guardiolas etc, but for now we are work in progress with a project to complete.