Barnes signed a new four-year deal with Leicester shortly before coming to Albion on loan.
He has scored two goals already this season, adding to the five he got at this level for Barnsley, and is flourishing in his new central role behind the strikers.
“It's been a really positive start," said Barnes. “As a team we've progressed a lot from the first game of the season until now.
“Personally as well I feel like I've got a lot more confidence in this new shape."