It will not impact control. It will feel different when you ride, so go easy at first, but your mind and body will quickly adapt and it will be a non issue.
I have long legs and shortish reach. 5'9, with a 54 frame, and 60 stem AND short reach ritchey bars.
Don't alter saddle position, you can introduce other issues such as knee pain, every fitter I have talked to have said I did correctly. Adjust saddle so lower body is in position properly in relation to crank and pedals. Adjust stem, bar reach positioning for upper body. Don't sacrifice lower body geometry for upper body reach.
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