Can I ask for a recent feature change to be reverted in whole
You certainly can... but let me rephrase your question:
Should I ask for a recent feature change to be reverted wholly?
You were not notified about it before it happened, or
You were notified, but were not afforded enough of an opportunity to voice your objection, or
You objected, ...
One of the golden rules of moderation (both for ♦ moderators and regular users performing moderation tasks): don't act when there might be a conflict of interest. Yes, you can act on your own posts, but only if it's rather obvious that your action is right. (Some examples: rolling back a bad edit on your post, or flagging an abusive comment.)
Can they ...
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Why is wikipedia asking for donations is about Wikipedia, not about Stack Exchange at all so it's not ...
Generally, with our own posts we tend to try to avoid conflicts of interest. I would much rather have another moderator make the decision, ideally without too much prompting. There are no formal rules, but as folks who've been handed the keys and trusted to make the right decisions, we kind of try to live up to that trust, and do our best for the community.