Swain Doesn't Really Feel Like Enough of a "Master Tactician" to Me.
Just read the Journals of Justice, his lore and especially his League Judgement to see what I mean by that. He has such an awesome character full of intrigue and tactical finesse and I really feel like his kit fails at delivering that. Pressing R and pretending to be a train is not exactly tactical.
Compare that to his most trusted ally, LeBlanc. She is "the Deceiver" and all her tricks, mobility, clones and jumps are all about that and really do reflect her lore and character, especially her reworked double R which I absolutely love concept-wise.
I never really play Swain and I feel like over the time his tanky healing mage kind of playstyle has found many mains already who would be disappointed if that would change but I think it's sad that his playstyle is so disconnected from his lore and character.