I do not think there is anything that levi does that steel cant do on sova, TSM need an igl, a good igl with structure. Tigg fills the astra role and has easily proved himself(not to mentions scrims that occur that we don't see) you undervalue experience, structure and an igl, Levi is a t2 player who can't igl, even if he is good in ranked or scrims or whatnot, he isn't so insane to the point you want him over guys like corey tigg and steel who bring better xp and fragging. And unlike steel, has not igled the previous 2nd best team in NA behind SEN and igled on LAN. People value roles and such waaay too much, any t1 PRO PLAYER can practically play any role given a few matches to adapt in scrims+officials. Proper calling and structure from a team that has actually won something like 100T should be the number one priority period, I don't even like steel but its just stupid asf for TSM not to sign him if they wanna win. On top of that you underrate TiGG, watch him play a little bit and you will know he is miles ahead of Levi(who doesen't play astra) corey(guess what doesent play astra) and dre(guess what?), as an LG fan I have seen lots of TiGG and it is clear he is far ahead of other smokers and can actually frag on the role, I have not seen a true one trick (- some jetts like wardell)on the pro level yet, if you are a good player you can adapt, but like you said we gotta wait and see.