This was possibly due to such a high saturation of generals in Dominaria making the entire time period have a strong if everything is special, then nothing is special vibe
So, what card could have outclassed them
5 Knight-Errant Of Eos Can't Go Wrong With Classic Convoke It's no secret that Boros Convoke was among the best decks in Standard prior to rotation
His greatest secrets are inscribed in a Book of Shadows, which he has warded with terrible curses to protect it from prying eyes
Whoever becomes my Ring-bearer, and by doing so becomes a legendary creature, is not something I have to declare when people are looking to interact with my spell on the stack
Combined with cards like Hymn to the Ages, it makes a nice blue-red spellslinger base, and its mana value of 2 means you don't have to put much work in to combine it with Dreadhorde Arcanist