As a long term Deathguard player I have mixed feelings about an all terminator force. I do love my objective secured Plague Marines.
Back in 4th ed I did considder a termie army and bought the Apocalypse termie strike force they released several years ago (15 termies + termie Lord). Now that 7th edition allows termies to score as well as contest (except against troop choices) the idea of a Plaguewing force is much more appealing.
HQ: Typhus, Termie MoN Lord with claw & Brand
Elites: 3x7 Termies with MoN, Plenty of combi weapons and a mix of close combat weapons.
Troops: 1x30 Zombies and several other 10 strong zombie units
Fast: nope
Heavy: 2 or 3 pairs of Obliterators with MoN.
The Zombies are there to hold objectives being fearless and with FNP they are difficult to shift from cover especially when there are far more deadly termies deepstriking in the enemy's face and threatening a charge after combi-plasma spamming a unit to death on arrival. I don't feel too bad at including their unarmoured corpses in such a list. In orter to take them you must have Typhus and if he isn't the living embodiment of the Plaguewing. The Lord makes another unit fearless and gets I5 in challenges and of course the brand is great at shifting people from cover.