SEOUL, South Korea—South Korea’s incoming president said Sunday he will abandon the mountainside presidential palace of Blue House and establish his office at the Defense Ministry compound in central Seoul to better communicate with the public. The plan drew backlash from critics of the relocation plan, who warned that a hasty movement of top government offices would undermine South Korea’s national security, require excessive spending, and violate property rights of residents in the new presidential office area. Relocating the presidential office was one of President-elect Yoon Suk Yeol’s main campaign promises. The conservative former top prosecutor whose single five-year term begins on May 10 said the location and design of the Blue House have fed criticism that South Korean leaders are cut off from the public and wield excessive power. At the Blue House compound, offices for presidential advisers and the press room are not in the same building where …