In particular I'd like to take a look at the Necron Decurion Detachment. The reason I'm choosing to look at this in detail is threefold. Firstly, it is a detachment that a lot of people are familiar with so the majority should be able to follow along with my reasoning. Secondly, it is one of the more complex methods of building an army, being a detachment that is made up of formations. Finally, it includes pretty much all of the problems that I have with formations.
|Behold! The tome of many sins!|
Moving on to Codex: Necrons and the Decurion detachment. The first problem I have found is that players (particularly those new to the game) find the construction of a Decurion list confusing. More than once I have set up opposite a Necron player who has proudly announced "I'm fielding a Decurion!" and when the models are placed on the table it turns out to be a Reclamation Legion with a couple of random units bolted on the side. Or even worse, they have neglected the Reclamation Legion entirely and tried to make a Decurion out of different formations. I think the confusion here arises from the double stacking restrictions used in the Decurion ie. you must take certain units to make a formation and you must take certain different formations to form the detachment. This isn't my main problem with the Decurion, just something I've observed from across the table.
The main problem I have with the Decurion and the Necron formations in general is the special rules they offer for seemingly no reason. For example, the Reclamation Legion is potentially a very large formation (it has many non-compulsory choices) with comparatively few restrictions (you must take a few units of necrons, an HQ and some jetbikes). As a reward for adhering to this loose structure the entire formation gains relentless, move through cover and a bonus to reanimation protocols. The question I have to ask is why? Why are these rules given to this formation? Essentially the army is a standard CAD plus some jetbikes, why do they now have move through cover? Have their feet been replaced with hoverboards? (note: if somebody converted this I would be totally ok with them using this formation.) Are the jetbikes somehow magnetically towing the warriors through cover? They also have relentless, again, why? What makes them able to fire heavy weapons on the move? Or able to rapid fire and then charge? Personally I can see no narrative reason for these special rules to be granted. The army isn't particularly characterful, it's little more than a regular CAD (why the jetbikes are included I will never understand) so there is no fluffy reason for additional special rules to be granted.
This problem occurs time and time again in the various formations that make up a Decurion. The Canoptek Harvest has similar issues, plus some rather nasty additional bonuses. The Royal Court falls into the same boat as the above. But that aside, let's look at the Decurion as a whole. In order to field a Decurion you must include one Reclamation Legion (see rant above) and one other formation or unit from a choice of nine. For doing this, the army is granted yet more reanimation bonuses (above those already offered by the Reclamation Legion). The question once again is why? I can see the justification for the reanimation bonus within the Legion itself, you are fielding a powerful warlord whose abilities allow his warriors to rise from the grave time and again. Personally I think that's pretty cool, it fits from a fluff perspective (if you ignore the jetbikes, relentless and MTC). But why, oh why, should adding a single unit of flayed ones or deathmarks to the army suddenly increase their reanimation ability? What is that extra unit doing to justify the extra reanimation? Do the flayed ones have spanners and greasy overalls to rebuild their fallen comrades? Are the deathmarks somehow cobbling together additional warriors from battlefield salvage? I don't know, and it's questions like this that spoil my immersion in the game and ultimately become annoying.
I feel like I've rambled enough (kudos if you're still reading.) I know I've picked very specific examples above and there are several detachments and formations that don't have these failings. But there are a great many that seem to grant powerful special rules with only the flimsiest of pretexts.
Let me know your thoughts in the comments. I'm bound to have raised a few hackles with this (particularly amongst you Necron players) but it's an interesting topic for the community and one that provokes strong feelings on both sides.