Not sure if this is outside the scope of this round, but I've always struggled with the "migrated from" post notice:
My problem with this is the links. Unlike the "migrated to" notice, the "migrated from" notice has the links in the opposite order. The URL in "was migrated from" points to the FAQ question on meta, while the link in "Migrated [time] ago" points to the original question on the other site. And as I was reminded about in the comments, both the links are on the word "migrated", which doesn't exactly clear up any confusion.
I have no idea how many times I've made this mistake, and I still keep clicking on the FAQ link instead of the source link, because I do it more often with "migrated to" notices where the links are, arguably, more sane. The "migrated to" notice is also consistent with the return notice, where the first link is to the original question, and the "Migrated [time] ago" link is to the FAQ.
This is already included in the question, in both the current and proposed version.
This question was migrated to [$toSiteName$]($destinationUrl$) because it is [out of scope on]($OnTopicUrl$) [$SiteName$] but can be answered by $destinationSiteAudience$.
This is the proposed version, but the current version has the links in the same relative positions
Please consider making the "migrated from" notice links consistent with the "migrated to" notice links. Assuming no other changes to the text, the notice on the migration target could be
This question was migrated from [$fromSiteName$]($sourceUrl$) because it can be answered on [$SiteName$]
It also appears the "Migrated [time] ago" bit isn't part of the template, but the link there has to be changed to point to the FAQ to complete the change.
Example question pair for a demonstration: destination, source, though this does appear on any migrated questions. Feel free to find examples on Your Favorite Site™
Note: I'm only commenting on the link order, and not the content. Whether the text is changed from my example isn't really important to me, as long as the links are placed as sanely as the "migrated to" dialog