Better Alien/Mermaid/Plantsims please

I completely agree! I was so excited to finally have mermaids and was disappointed in their gameplay. They don't even have a Mermaid panel like Vampires and Spellcasters do. There's no incentive to gain more skills as a Mermaid. Once you become/create a mermaid, that's it, you have everything.

The same with Aliens. They could have had different interactions, only available to Aliens, while in Alien form. They don't have any objects in BB that I can remember. Aliens are literally regular sims.