Koeman's comments interesting :
"He's there to tackle, win balls and be energetic in the midfield [sic] maybe the cleverness on the ball - that's for Barry."
So basically, the role we should expect from Gueye is pure sweeper, disrupt the opposition play and give the ball to Gareth Barry as soon as possible.
Sounds be like he agrees with your assessment @Bluedylan
- Gueye will always be partnered with a baller.