Are you talking about the 6-core maps which briefly turned up for some people but were greyed out? Those were never meant to be released, well, certainly not yet at any rate, so they went and are not available to anyone.

The benchmark is kind of simple compared to a vast map with loads of AI, I expect it benefits more from the 6700k's higher frequency over the 6900k's extra cores. I think in a big game the 6900k will do better, though to be honest I think you'd be fairly hard pressed to put the game into a position that the 6700k couldn't handle. If you run the game's CPU focused benchmark the results might be more interesting and should favour the 6900k by a fair margin.

You could overclock the 6900k for a bit more single core goodness. I think the 6800k overclocks to 4.0Ghz fine so makes for a good gaming and production system. For peak gaming performance the 6900k's single core frequencies are a bit too slow. Off the top of my head I don't know how much it comfortably clocks to though.

Quick graph on Ashes you might find interesting for comparison:

http://www.techspot.com/review/1187-intel-core-i7-6950x-broadwell-e/page6.html

(If you only have 2 sticks of RAM make sure your RAM sticks are in the right slots, otherwise the dual channel bandwidth loss can hurt performance a lot(If you have 4 sticks I guess it will use quad channel automatically))

I upgraded from a FX 63xx, to an 8320 and gained 8 FPS. Not alot, but I multitask a lot so I wanted extra cores.  For a big gain in FPS, get a new Video card. Cant see why youd upgrade the CPU for vast maps, Seems like that would be Video card memory and maybe system memory.. Now if there are events, or functions built into the map?  What constitutes an 6 core map?   Not getting why youd need more cores for a vast map.. Think Memory right?

They were probably all 14 player max size maps which would slow down a lot of systems quite a bit. With lots of units it'd get very taxing for nearly all CPUs. They were originally seen in November so probably won't be seen again for a while, but maybe they'll appear again soon because of the Ryzen CPUs having more cores.

The biggest factor is video card. I have a 4790k quad core and it's more than enough to handle AOS. Any I5 (Haswell and above) or Rizen can handle AOS and if you want performance you need a better video card. 

I don't have problems with 970 gtx and I don't see myself upgrading the system very time soon.

I upgraded from a 6320 to an 8320 and got 8 PFS. I only have a GTX950 so my video card is holding me back.