Guyot would have used the Remover on him as soon as he worked out how to activate it. That was only a matter of time. That way, he might even have beaten Archanfel to the punch.
Sho might even be the better for it. After Guyot removes the armor, only human Sho would be left. I bet even the communication nodes on his back would disappear like scar tissue.
Would Guyot let him live? I think he would. He would be so over the moon with having the unit, he might even be grateful.
Of course, the question is whether it would do Sho any good in the long term... I wonder if Guyot, merged with the unit, would have been more powerful than Archanfel. Probably pretty close.