Okay so I'd like to see what uses people think we may get out of decurion style detachments into the future.
They are clearly for the larger 'full' factions as they have the options to make it work.
One thing that GW may be doing is giving a significant boost to playing with one faction, and to non imperial factions who don't have a wealth of battle brother options ( just a theory don't shoot!!). Yes it seems that they are all about allies but it gives an alternate for a strong build.
For the record I'm all about fluffy builds and am always trying out ways of writing up interesting lists.
Going way back I think GW tried to represent different factions within a codex but the FOC often held that back, and FOC swaps often compromised internal balance. For example I have 5000 pts of eldar and with the 4ED codex I could represent Iyanden,Beil tan, Saim hann, ulthwe and alaitoc . The problem I could see though was that it was quite a bland way of doing it and your opponent wouldn't know which faction it was if your army wasn't painted as such.
This brings me to space marine chapter tactics. On the plus side they are a great way of giving fluffy, flavoured rules to represent founding chapters and their successors. On the flip side they are often quite powerful upgrades, which I think the main gripe people have with them is that their free.
How I think these differ from decurions and formations is they're unrestricted, a small difference but an important one.
Another thing I've noticed is supplements haven't been the same since crimson slaughter (I could have this well wrong). Not in their composition but on the force they represent. In one corner you have factions Iyanden,black legion, farsight etc, in the other you have something else haemonculus covens, waaagh ghazgkul, champions of fenris. I could be splitting hairs here but it seems a slight change to me. I believe mini dexes ala harlequins and skitaari will replace the faction specific supplements. Now what to do with the unrepresented factions?
I proposed an idea a while ago on the many, many discussions of what to do with CSM. The problem is that with chaos being so multi faceted how do you cover this without a myriad of codecies, mini dexes and supplements? Which will all need to be updated at the same time. My proposition was that you could do this with decurion style detachments.
Codex chaos: chaos space marines could be a way of representing renegades and legions..surely not!
World eaters detachment, iron hands detachment, 21st founding detachment etc. It would be varied and also give a possibility of some renegade chapters having access to more modern astartes wargear. Chapter tactics could be reformed into a decurion style to bring parity with others. What about those craftworlds as well? Craftworld specific rules and organisation all under one roof.
So this is my take on decurion style detachments, more fluff and less convolution for factions needing more than one book, a winner in my eyes.
But what do you all think? How would you construct a decurion for your unrepresented faction and where would you put it?