My understanding is that Leonard is more of a defensive midfielder, good tackler with a great box to box workrate
Where as Brooks is more of a creative flair offensive midfielder, so they are very different players.
Last season our midfield was too good for that division. We were allowed to get its own way playing an open offensive game.
I suspect Wilder is a concerned about the poor defensive qualities of Coutts, Duffy, Carruthers and probably Brooks too.
So he wants an upgraded Basham type midfielder, someone the right age on the way up, who can protect the defence but is mobile enough to also get forward and is decent in possession. We wanted to buy Sam Morsey last year to play this role but we were all surprised that Basham upped his game and played the defensive midfielder role really well but I suspect we can do better.