I see no issue with game balancing. If the current winning strategy gets changed that can be annoying, yes; but you can get through Tactician with basically any build right now so I don't see why the outliers being nerfed is an issue. Surely we should be happy that game mechanics are nerfed so you don't feel like you're gimping yourself by not using the H bomb.
Why is balancing the game a bad thing? Should we not celebrate that they are still thinking about how the game plays optimally for everyone? It's not like you design a game to be fun, just to intentionally make it unfun. This seems like an excessively silly topic.
For me, it's because it feels like artificially restrictive handholding. There's been plenty of examples of things in games where I
could abuse them to take advantage but I simply choose not to because it would spoil the experience: that's not "gimping myself", it's simply taking responsibility. But once in a while I would like to use something to its full potential and when that potential has been removed it feels like someone has stuck an invisible barrier in the way. For me it's about freedom of choice, not a rigid set of rules that I must adhere to (or to try to game the system, which is even worse).