I don't know too much about F-W.Len, but you have a fullscreen, and FAST, projectile, while C-Warc does not (excluding air eye beams).
As for C-Akiha, I have no idea if that matchup is as frustrating as it was back in MBAC, but in MBAC, Warc could j.B through any air move Akiha had. It probably isn't quite that bad anymore, but you're going to need careful air flametongue spacing, and good hitconfirms when you do manage to get in to win that matchup. You do have a good life advantage, so just try to keep Warc pressured and on the ground, I think. If this is anything like MBAC though, this is not an easy matchup.