Yes, Smith is 100% right. The way the new maps are set up it's really more about key points or weapons than a coordinated plan.

Turf- Holding the sniper is semi-important but it's not essential since the map has 2 different sections (Streets and back roads) and you can somewhat dictate where the battles happen.

Sanctuary- The snipers are the key here. Controlling the middle I have found also helps because it will cause their spawn points to be divided to both bases and they will always spawn in seperate areas.

Terminal - The wraith is the key... if you get the wraith and the rockets it's game over for sure.

Backwash - Get the PP/BR combo... it's fairly far apart but the BR is often overlooked because it blends in with the tree it's leaning on somewhat. The sword is also decent but it seems that there are enough trees that it is very hard to use on this level. Ranged weapons own everything here.

Gemeni - Fucking bungie only has ever gave me ONE game here so i'm not sure. The sword seems to be important as does the beam rifle but I think the most important thing here is the overshield. It's a small stage much like midship but it's more concentrated into one big room so it's a constant battle for the most part.

Relic - Snipers and holding the base... that's all their is to it. The base has too good of a vantage point for sniping to give up and having the higher ground where you can just step back when wounded is helpful.

Elongation - The shotgun works very well for holding the middle bridge that runs across the level. The seems to be the important key point as well since it allows you to access ANYWHERE on the map in just a hop skip and a jump. Battle rifles are at the bottom of the ramps leading up to the middle bridge and there are plasma pistols just below.

That's about all I can come up with right now... I'll have more specific strategies since I am the pone and you fools don't have the new maps yet.