Lens Question - replacing the 18-55mm kit

Hi All,

I own a 600d with the kit lens and a Canon 55-250 which i use for a bit of everything,

I recently returned from a trip to europe and must say im disappointed with a lot of my shots, due to the nature of the crowded cities its very hard to fit everything in the frame, ie: churches etc.

I am thinking about selling my 18-55mm kit lens and replacing with the canon 10-22mm and the canon EF 50mm lens. I would keep the 55-250 lens for zoom shots but feel most of my shots moving forward would be landscapes or portraits.

Is this a good move..? or will i be missing something if i replace my 18-55 with the 50mm and 10-22mm

Any advice is much appreciated.

Ben