They have not turned their back on Europe just because they have chosen Boeing wow! It's a business and they will go for the best deal and opted for the equipment that they have deemed best to suit their needs. It's not all about politics.
As for extra legroom seats i would presume so. It's a good additional revenue earner for an airline like ZB. However i wouldnt expect to see the final seating plans / config until the routes and bases are confirmed.