Look at TenZ, Cryo, Kinggg, Leaf, and Rb. They all swapped to support(let younger mechanical demons take the duelist roles) and their teams instantly got better. It feels like tactical strategy matters less than just playing aggressive, hitting heads and rushing sites with five players who all have duelist-level aim. (Best example would be LEV or NS, even to some extent PRX)
Of course, there are exceptions like NRG but they only work because those players are completely hive minded and have just insane team chemistry. Roster changes are so often that most teams just can't replicate that, in the short period of time.
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