What bugs me is that you can't call <xsl:next-match/> inside
<xsl:for-each> (because the "current template rule" is considered to
be nullified).

I'm sure something could be defined but the semantics of that would be a
little odd (whichever way it was defined) as next-match would need to
trigger a template matching the node that matched the current template
but that would not (usually) be the current node within a for-each.