I personally feel this would be a good idea. Less people would buy accounts since rank would be reset after the arena season. The only thing lacking with arena was that it had very few game modes , which would be solved if implemented across all playlists(except for a stuff like griffball,etc)
I think that would be an excellent idea, that way competitive players can get there fix, and it would get reset to give everyone a chance to “start again”.
Arena sucks. It encourages selfish play instead of teamwork.