The first change is one I actually recommend. It mitigates the already high competency of Conan PCs a bit.
The second is one I do not recommend, as this would make a powerful sorcerer being able to take a lot of physical damage, too, and a powerful melee fighter to be resilient against threats and fear.
In Conan, characters start out more competent than A!C characters and can - and should - take more Trauma and Wounds than A!C characters can take. This fits the genre of Sword&Sorcery.
I wouldn’t recommend putting both stress tracks into a single one.
One rule from A!C I do recommend: Allow only a single Fortune point per Skill Test or per combat round. That, too, mitigates the quite high competency of Conan characters a bit. Makes things more manageable.
Compare the rules change suggestions in this thread: