Move featured series tag

No its not. The "Add Series Part" button is PLACED via the xenforo template tag xen:topctrl and the location for that is located to the RIGHT of the Breadcrumb (as shown in the image below).

HTML:

<xen:if is="{$canManageSeries} && {$canAddSeriesPart}">
    <xen:topctrl><a href="{xen:link 'ams/series/add-part', $series}" class="callToAction"><span>{xen:phrase nflj_ams_add_series_part}</span></a></xen:topctrl>
</xen:if>

Here is the xenforo default style. Clearly the Add Series Part Button is located where XenForo buttons that use the xen:topctrl is supposed to.




And here you can see the standard responsive behavior when the topctrl is moved down and floated to the right.



I do know that some 3rd party styles have modified where the Top Control buttons display (pretty sure the Pixel Exit style that I am using here does it), but the "as designed" location is to the right of the breadcrumbs, so if your style changes that, you'll have to change it back if it causes problems.