I have discovered, as perhaps Kelsey will after her much-publicized resignation from the editorship of She after a build-up of stress, that abandoning the doctrine of “juggling your life,” and making the alternative move into “downshifting” brings with it far greater rewards than financial success and social status.

请问：

(1) as 引导的是什么从句？ 

【答】as引导非限制性定语从句，as指代整个句子that abandoning the doctrine of “juggling your life,” and making the alternative move into “downshifting” brings with it far greater rewards than financial success and social status. 在will之后省略了discover。

(2) as perhaps Kelsey will 是倒装还是省略？

【答】不是倒装，是省略。在will之后省略了discover。

(3) 如何理解句中的两个after？

【答】第一个after her much-publicized resignation是时间状语，修饰will discover。

第二个after a build-up of stress 也是时间状语，可以理解为resignation的原因。

(4) it 指代的是什么？

【答】that abandoning the doctrine of “juggling your life,” and making the alternative move into “downshifting” brings with it far greater rewards than financial success and social status：that从句作I have discovered的宾语。其中，it 指the doctrine（理念）。