You know, the Dominion Malta Expansion did introduce a sixth environment type called “Mediterranean.” Just like Alpine and Taiga, Mediterranean is closely similar to the base game’s Desert environment, with its own unique perks of course.
Like for example: Taiga has violent or extreme snowy/blizzard weather and/or effects on all its maps, but not Alpine as the latter has rain or light snow weather instead on some respective maps. Mediterranean has forest trees that contribute to a dinosaur’s comfort, but Desert has fewer tree options besides paleobotany and none of them contribute to a dinosaur’s forest comfort which is completely absent for those maps.
So, I like to wonder if they are planning to add more environmental types like the ones you added, they may have their own perks to differentiate between one another? Like what if there will be an Arctic environment, similar to Taiga, but has zero tree and few shrub brushes, excluding paleobotany? Or a swampy environment, similar to tropical, but with plants exclusively placable in water? Or plains, similar to Temperate, but with an exclusive weather effect that can damage your structures like lightning or wind without rain?