Promotions should feel like a roadmap, not a maze
There were some people who used Vaults to do the obvious things like put out quick large men, and they did well
Although you pay 3 life, most people would willingly make that swap all day long
At the time, I remember people talking about Kalemne as a proper giant tribal cardand in all fairness, that application of Kalemne has worked to some success
War of the Spark had flooded Standard with dominant three- and four-drop Planeswalkers, later topped off with the two-drop Wrenn and Six in Modern Horizons
Shutting off players from playing Ad Nauseam isn't nothing , but I also think there's so much interaction in Commander that it might be a trivial speedbump to remove him before an opponent tries to win