Thanks. I don't play AL, so I don't keep track of what they do; I'm glad to see they recognized the problem, though.
Yes, many infinite Simulacrum strategies are blocked if Simulacrum themselves can't cast Simulacrum. But they missed a spellbook in Storm King Thunder where there is a variant Simulacrum that can be cast without limit (and which can be acquired by players). Reasonable DM and players won't have a problem usually...