Adding CSS may not be the best solution — and my CSS may not be the best CSS — but I found that the following works to also add context to the reply-to-post (comment) button:
nav.post-controls {
.actions {
button.reply {
span.d-button-label:after {
// Adding this content after Reply
content: " to this comment";
}
}
}
}
Lacking a way to relocate a post after the fact, clearer labeling seems a good way to prevent confusion. Ideally this would be in the form of custom button label fields in Settings.