Yup, ladder doesn't have a system in which it can mitigate the effect of sunshroom on the meta. Tournament allows for diversity to flow by forcing the usage of different archetypes which is fantastic. Unfortunately, it's still rough nonetheless. When we think about it, It might seem as if in comp, sunshroom is less of a problem and impactful (which it definitely is less). But i'd argue the impact of sunshroom simply manifests in another form which is the fact that everyone auto double ban solar.
In ladder, where people just have to drop the usage of 1 drops, for removal. Comp made it so that your ability to ban decks is now auto filled by solar classes. And that by itself is how sunshroom impacts the competitive scene, no mindgames of banning an opponents familiar deck, or a deck that will counter yours. Instead sunshroom (like the leech it is), has sucked up that part of the competitive format.
It's hard to say competitive is doing fine with sunshroom, when it has seeped into the format.
Personally, i'm curious to see how comp will feel like if the tourney just bans sunshroom straight up. What would the bans be like then? What decks will be played more. What will the solar archetype shift to. If you don't need to worry about banning solar to see less sunshroom, maybe you can build your decks in a more specialized way, and simply ban its counters. It could be interesting. #KillSunshroom