Thematically, I'd love to see Beasts of Nurgle in the Daemon Pool to match the other Power-specific lists, but that brings up issues with the Plaguebearers. The most common BoN stat line I've seen is the one in the Ghallamore Incursion list, but 3+/3+/5+ Plaguebearers make them almost completely redundant. I've tried looking back through the various Chaos development threads but can't find an explanation for NetEA Plaguebearers having gone 'back' to 3/3/5 from 3/4/6 as seen in the 2014 Compendium lists, does anyone know what happened there?
Nurglings I think are fine being represented as part of the Plague Zombie Infestations, even though the stat line isn't very similar.
EDIT - for easier reference:
Beast of Nurgle INF (from viewtopic.php?f=82&t=23785
Armour 3+ CC4+
FF5+Ignore Cover on the CC and FF attacks
Notes: Fearless, Invulnerable Save, Mounted, Walker
Plaguebearers INF (from both Chaos lists on http://www.tp.net-armageddon.org/
Armour 3+ CC3+
Notes: Fearless, Invulnerable Save
In that comparison, the Beasts are potentially better when engaging poorly armoured/unarmoured formations in cover, at the cost of being substantially
less manoeuvrable. In all other situations including defending in an assault, the Plaguebearers are equal or better.
Notably, LatD Redux has Plaguebearers at 3/4/6+.