I later went Jeskai for artifacts, and have had trouble enjoying mono blue since
Trawler sees play as an answer to graveyards and another utility goblin that you can fetch up
You want to hit your land drops anyway, so a cheap blocker that generates effectively free value is very welcome in a strategy that needs to churn through 60 cards rather than 20 life points
This allows us to speedrun through dungeons, generate tons of value while draining our opponents to death, and of course reanimating
Many goblins either create more goblins when they enter the battlefield, like Siege-Gang Commander, or have buffing effects, like Hobgoblin Bandit Lord
I evaluate commanders on power, of course, but I also consider the vibe: Are these commanders introducing a novel new archetype or breaking new ground within an established archetype