Nice work IJW, I'm looking forward to getting some games in with this list.
This is a bit of a wall of text sorry; there is a summary at the end for those who want to skip a bit.
I had a bit of an epiphany on the Terminators last night. Something wasn't quite right with them, and I couldn't quite put my finger on it. But I think I've worked out what was bugging me now. It is more to do with the presence of the units themselves, rather than stats or gameplay.
Some food for thought on terminators:
Background.
During the heresy there were many Terminator variants within the Death Guard. Deathshroud, Grave Warden, and regular Terminators wearing Cataphractii and Tartarus pattern armour. Probably others too.
However in the 41st millenium these different formations no longer exist. Presumably the standard "Nurgle Terminators" are a mix of all of the above, as a result of the fracturing of the legion after their defeat at Terra and in the years of constant warfare since. The most powerful individuals would have gone on to become Lords and Sorcerers in their own right, possibly attaining daemonhood (or spawndom!). Others would have been combined into smaller units as attrition took place, and with the end of resupply of the highly specialist armour and weapons, presumably the armour of the fallen (both friend and foe) is salvaged and repaired. So the terminators in the 41st Millennium are in all likelihood vastly different to the Deathshroud and Grave Warden squads that existed in the heresy. They are more likely to be an amalgam of both, combined with features of other terminators. Note that none of the traitor legion specialist terminator squads survived the transition to the 41st millenium intact. No matter how cool they are (or how much we all want them to!).
However there could still be a preference to fight using the strengths that are inherent in the geneseed and the tactics that the marines were originally proficient in.
So taking this idea forward, this works well too at epic scale, and the different versions of terminators could be abstracted fairly neatly back into one unit type. This would potentially cause less headaches balancing and designing the list too.
The current Deathshroud Terminator unit entry are armed with the two Autocannons all chaos terminators are armed with, so clearly aren't Deathshroud. At a minimum it would be great if they could have a name change to something more fitting for the 41st millenium - Plague/Nurgle Terminators.
However it might be worthwhile scrapping the reaper autocannon option and replacing it with heavy flamers which is much more characterful for this army.
Looking at other approved Chaos Lists for precedence, neither the Black Legion nor (more importantly) the Emperors Children terminators are fearless. Even though the Noise Marines are fearless. So personally I think fearless has to go (sooner or later) for these guys to get approved (although the EpicUK list implies otherwise). This would reduce the cost of the formation too, and therefore could allow it to be a formation of 4-6 consistent with the other lists.
Mucking around with these ideas I ended up with something that looked remarkably like the Grave Warden unit entry without fearless:
INF 15cm 4+ 3+ 3+, Inv, RA, Teleport, TRA.
Power Weapons. (bc) EA+1, MW
Chemical Heavy Flamer 15cm AP4+ IC AND (15cm) (Small Arms) EA+1 IC (possibly with disrupt if you wanted to further offset the loss of the reaper autocannons).
The lack of range and lack of manoeuvrability are a bit of a hurdle to overcome. But upgrades can help if that's what you are after. And shooting at range and being manoeuvrable wasn't really their thing. Killing things in firefights and close combat in dense terrain was their thing.
So in summary:
how do people feel about removing the Deathshroud entry completely, renaming the Grave Wardens to Plague Terminators, dropping fearless, and making the unit 4 with a lord for 275, with up to two extra for 60 each?