The attacker's form has been inconsistent since his €27.5 million move during the summer but he has vowed to recapture his best in 2014
The 24-year-old, who joined the German outfit for a club record €27.5 million to fill the void left by Gotze's switch to Bayern Munich, has failed to find consistency for die Schwarzgelben this season, with his side currently sitting 12 points adrift of Bundesliga leaders Bayern.
The Armenia international, who has scored five goals in 23 appearances in all competitions, hopes his form will be more consistent in the second half of the season but has urged supporters not to compare him to former BVB stars Gotze and Shinji Kagawa.
"I cannot help it that I have become so expensive. But I will do everything so that Borussia Dortmund do not regret buying me," Mkhitaryan told Waz.
Talking about comparisons made between himself and former Dortmund players, the midfielder added: "Every player is different, you cannot compare us."
Sporting director Michael Zorc is also confident that the former Shakhtar Donetsk man will fully settle in to life at the German club and repeat the form that put him on the radar of several of Europe's elite last season.
"He's had some games where he has not stood out. Others he has almost single-handedly decided the result," Zorc told Waz.
"He came from a league in which he did not need to recover the absolute top level every few days. But that is called for in the Bundesliga and other leagues. At this level he has to get used to that."
Team-mate Marco Reus also believes it is unfair to compare Mkhitaryan to other players, instead insisting that he has the credentials to be a great player for Dortmund in his own right.