A bit of Yin-yang amid the massive changes at The Wall Street Journal. The newspaper is cutting 50 editorial positions to restructure editing across print, online and mobile, according to a memo distributed Wednesday by Editor in Chief Robert Thomson. The Journal’s South Brunswick, N.J. bureau is bearing the brunt of the cuts. As part of the restructuring the Journal will be adding 95 journalists, both in print and online. “An ambitious expansion” of the Journal’s Web and international operations is in the pipeline, the memo said.