While Vexilus Praetor can be very strong especially if your Commander is a Planeswalker
In the same way that you would tweak your deck over time to make it play better, you can tweak your deck in the middle of a match
For instance: Creatures (21) Planeswalkers (2) Lands (22) Spells (15) By contrast, Colossal Dreadmaw is worse than Carnage Tyrant in 9.44 ways and shouldnt see play in Constructed anywhere
Academy Loremaster Anvil of Bogardan Dictate of Kruphix Font of Mythos Howling Mine Kami of the Crescent Moon Karma Ludevic, Necro-Alchemist Maralen of the Mornsong Mezzio Mugger Mornsong Aria Nekusar, the Mindrazer Omen Machine Rites of Flourishing Shadow of the Second Sun Spiteful Visions Teferi's Puzzle Box The Grand Calcutron Well of Ideas
+1: You may exile a nonland card with mana value 3 or less from your hand
Locking opponents out of the game is a truly game-breaking effect, and it led to what many consider a controversial ban in Commander in 2019 when Painters Servant was unbanned