The Whites have lost just once in their first eight league matches, and currently occupy a position just outside the play-off spots in the second tier table.
However, Rosler still feels that there is a lot of improvement that Leeds need to make if they are to meet their ambitions for the future.
"We are a work in progress," he said. "There are a lot of things that we want to improve and we have to improve if we want to be a top team, which is our aim. We have to work on our possession game. We have to work on how we play against established defences.
"Our recruitment will also play a big part in making us better in certain areas going forward."
One new arrival who has joined the group this week is Will Buckley, who has trained with the club ahead of the completion of his loan move from Sunderland.
Buckley should add pace and creativity from wide areas, with the winger also bringing useful Premier League and Championship experience to the squad.
His arrival adds further quality to a Leeds tea, which is starting to take shape under Rosler, and there are high hopes that this season may be a very productive one.
The Whites have been languishing in mid-table in the Championship for what seems like an eternity, but there are signs of real progression now, and with a visionary coach such as Rosler at the helm, they appear to be in good hands.