Solasta being too easy past a certain point isn't so much related to how it uses the monsters but to how it rations out encounters and the 'adventuring day.'
This is just not true, as I discussed extensively in the Solasta thread. After someone made the same claim there, I played entire maps without long resting once - 5, 6 sometimes 8+ encounters without playing in some autistic manner, cheesing anything or hell even playing that carefully.
The game is ridicoulously easy, and the accessibility of resting isn't the explanation.
More likely, it's that they were so blinded by their 5E-adherence that they forgot the player had a reload-button. Not that you're gonna use it much playing Solasta.