No. The point of level freezing is to get into lower sage and win that to get refines, which helps win the initiative war. However

1) You're weak so won't win anyway

2) Everyone level froze anyway

3) SWB isn't always split into 2 level groups, so you're gonna end up vsing the big shots anyway and you've just sacrificed a bunch of power

Start on a new server, you can then be somewhat competitive in terms of F2P's