Going from,
Quote
<item>
<title>
[Untuned Translation]Lillia and Treize (Novel) v.3 c.2
</title>
<description>
2015-01-02<br /><a href="http://www.mangaupdates.com/series.html?id=114789"> Lillia and Treize (Novel)</a> - <a href="http://www.mangaupdates.com/releases.html?search=114789& stype=series">View All Releases</a>
</description>
<link>http://www.mangaupdates.com/series.html?id=114789</link>
</item>
<title>
[Untuned Translation]Lillia and Treize (Novel) v.3 c.2
</title>
<description>
2015-01-02<br /><a href="http://www.mangaupdates.com/series.html?id=114789"> Lillia and Treize (Novel)</a> - <a href="http://www.mangaupdates.com/releases.html?search=114789& stype=series">View All Releases</a>
</description>
<link>http://www.mangaupdates.com/series.html?id=114789</link>
</item>
to,
Quote
<item>
<title>
Lillia and Treize (Novel)
</title>
<group>
<a href="http://www.mangaupdates.com/groups.html?id=4796">U ntuned Translation</a>
</group>
<volume>3</volume>
<chapter>2</chapter>
<description>
2015-01-02<br /><a href="http://www.mangaupdates.com/series.html?id=114789"> Lillia and Treize (Novel)</a> - <a href="http://www.mangaupdates.com/releases.html?search=114789& stype=series">View All Releases</a>
</description>
<link>http://www.mangaupdates.com/series.html?id=114789</link>
</item>
<title>
Lillia and Treize (Novel)
</title>
<group>
<a href="http://www.mangaupdates.com/groups.html?id=4796">U ntuned Translation</a>
</group>
<volume>3</volume>
<chapter>2</chapter>
<description>
2015-01-02<br /><a href="http://www.mangaupdates.com/series.html?id=114789"> Lillia and Treize (Novel)</a> - <a href="http://www.mangaupdates.com/releases.html?search=114789& stype=series">View All Releases</a>
</description>
<link>http://www.mangaupdates.com/series.html?id=114789</link>
</item>
While I remember some suggestions to custom RSS feeds, I know that would increase server strain so instead I suggest something that would only require the modification of a single php file which would pull about the same amount of strain compared to the current set up. Users could then more simply filter the RSS feed on their side via the new fields.