Steel is what a lot of top NA teams, besides maybe TSM and Sentinels, need — especially T1. Honestly thought he'd be going to T1, but i doubt he'd want to play with AZK and brax ever again.
The team that would benefit the most from an IGL right now is obviously T1, but I think the team that would have the highest skill ceiling would be C9. Them with a fragging IGL would be absolutely nuts. No offense to Shinobi, but Steel is twice the player he is and some.