I dont know how ROP Gold rates him in the game but in case he is unchanged..
The man has been underrated in the game so far IMO, I dont know what would be the best solution, more abilities or better stats.
But i do think that he is not feared in the game like Fredrick is and in reality the French did not like fighting him at all.
His campaigns are truly amazing against all odds!
Maybe the event sending him to Hannover should include some new abilities, so there is clear incentive to send him?
Opinions on the man and how the game treats him?
http://en.wikipedia.org/wiki/Duke_Ferdinand_of_Brunswick-Wolfenb%C3%BCttel
http://www.kronoskaf.com/syw/index.php?title=Ferdinand_of_Brunswick