>>55534670I think the area bonus limit is determined by either your research rank, or your sleep style dex goals, but I'm not sure either way.
You can definitely exceed 50% area bonus however, my Greengrass Isle bonus is currently 55%.
Something to note about the Pokémon level caps that increase with your current research rank, is that it doesn't occur at every 5 research levels.
>Rank 01 - Lv. 15>Rank 05 - Lv. 20>Rank 10 - Lv. 25>Rank 15 - Lv. 30>Rank 20 - Lv. 35>Rank 30 - Lv. 40>Rank 35 - Lv. 45>Rank 45 - Lv. 50>Rank 50 - Lv. 55You can see that ranks 25 and 40 don't increase the level cap, just because.
As the game progresses and hard caps are lifted, I'm expecting it'll be done 5 ranks/levels at a time.
Serebii reports that max rank of 55 has a max Pokémon level 55.
https://www.serebii.net/pokemonsleep/researchrank.shtmlTheir page incorrectly states that Lv. 55 is unlocked at rank 51, but it's actually rank 50 which is my current rank.
I don't know if anyone has actually hit rank 55 yet, but I'm hopeful but doubtful that level 60 is available at rank 55, due to the official news in-game stating 55 to be the cap.