Ah yes, well, I love Zeph has summed up all our arguments.
In all seriousness - On Saturday, we discussed a bit on Discord, so I'll repeat;
Vayla can very likely shove the soul in based on it's strength and mastery of the soul (since fighting her straight-on is suicide), and her soul programming skills rival those on the level of Mastema's skilled allies and the complexity of Inner Worlds.
Inner Worlds are something that would, by the definition of them as a subconscious power-influencing metaphysical plane (as a very, very simplified definition) would fit inside a TIC soul. The Boon of Souls offering absurdly high autonomy over Vayla's up means she'd have free rein to **** up Mastema's Inner World and it's effects.
However, complete destruction of said Inner World is basically impossible, given that it regenerates constantly to unwind itself, and it's already incredibly powerful and destructive in it's own right.
How it probably would go, is that Vayla would begin the metaphorical process of a child trampling over a
giant LEGO statue, not to permanently destroy it, but to scribble enough nonsense code on it that it outright can't function properly and causes immense distress to Goat God.
She is likely to contact her allies, which will be quite a problem, so Vayla has got to hurry up. The plan would be to screw with Mastema's Inner World enough and provide such an immensely annoyingly, persistent threat, that Mastema's either fails to notice a line of soul code that makes her wool fall off, or make her give it up voluntarily so Vayla will get the **** out.
(Wool God will hunt her down later but that's not the point)
Does such seem accurate?