Thank you for your feedback on the status of Seal Rock and Frontline. We understand your interest in this mode, and would like to share a comment Yoshida made during a previous interview. Yoshida mentioned the team has been discussing the future of Frontline and believe that adding a new map for Seal Rock may become one of their priorities.
Please continue to share your thoughts and ideas for future PvP content, and we'll be sure to pass it along to the dev. team.