tier5 players are all better than Grat tbh. Most of them are free or in smaller orgs (so potentially cheap to buyout).
Then, you have to consider that you aren't really attractive to foreign players as you have to live in Aussie (the other part of the world), far from fam and friends to play for RNG. Australian scene is really cool and all but not a lot of talents to choose from.
Players such as jkaem, NAF and Nifty have worked quite well and were not even close to be t1 at the time.
Have you watched MSL play recently ? Very impactful AWPer + genius IGL as usual. But i agree that it doesn't make much sense as they (at least i think) are not going to change their IGL.