Then I don't know what you mean by "driving sales". "Driving sales" would be taken to mean pushing sales up. Competition does the opposite of that, it reduces your sales and thus forces you to act to stop your sales from falling.
Look at the list of top selling games of all time. Tell me how far down the list you have to go before you find pew pew and pew. Incidentally Skyrim is on that list, Halo isn't. And if you look at the overall pattern you'll find that there aren't as many multiplayer PvP type games as there are other games. Puzzlers do well, but except for those sandbox games invariably do better than shoot 'em ups. Minecraft and GTA are the two most popular PC titles, and except for a smattering of Calls of Duty and one Battlefield I can't see hardcore action games on the list at all.
I've posted a lot of actual stats and figures to make my case here that the game doesn't have to be marketed in such an action-oriented way in order to be successful. Do you have anything a little more substantive to refute them?
I have to agree with FuzzySpider here, Competition does not drive sales, in fact it forces you to cut cost or innovate to retain market share. Reducing selling price will again help in driving sales, but is a doomed strategy as you can only reduce selling price so much.
What does drive sales is a unique selling point, something your competitors do not have (at least for a while) and for Elite, PvP combat isn't it. I have a horrible feeling E: D's marketing team is spending far too much time looking at market trends to see which direction the product should take rather than really looking at what they have and producing a strategy to deliver a sandbox with content that is a little bit different from the competition.
At the moment Elite is a framework with some unique selling points, if i was them, i would be looking at how i could better the game without turning it into World of Tanks or Candy Crush