For now, when you T-pose the ragdoll, by default it will be facing at the direction where you were standing when you T-posed it, which we just don't know since Gmod doesn't tell you the value in which direction a certain ragdoll or object is, it could be 33.26° or it could be 70.41°, we just don't know.

Can we have a feature where there's checkbox that can be enabled/disabled, and as soon as you T-pose a ragdoll, it'll be facing at exactly 0° or a different "default direction" where there's a text box to enter a value like 45° or 90° and as soon as you T-pose a ragdoll, it'll be set at that direction, mainly for a perfectionist posing and to avoid "wonky" posing?

If you have used software like Blender, many models are by default posed at 0° degrees, you can rotate them and make them face exactly their left or right by entering 45° value, or rotate them and make them face exactly their back by entering 90° value since Blender has a text box where you can enter an exact value, to which this tool doesn't have a text box to enter for now.

I have personally used models in Blender that, even though their default values were 0°, they were rotated at exactly their left and I was able to make them into a more natural pose when I entered exactly 90° degrees, since if I were to manually rotate them without knowing the value they are in after rotating them, I will surely have troubles posing them and stuff (some models tend to be like that and not just the ones I used).