Yes, crowdfunding has only funded part of the game. However, the part that it funded is the months between now and November. Sven said at the beginning that if they hadn't gotten the funding they would have had to put out the game this month or next month because they wouldn't have had the money to continue development.
Because of that, all content created between when they get the funds and when the game is released is funded by the crowd. Now, it's up to Larian how they decide to use that funding, but to simply add pvp before game release when that was never even mentioned during the campaign would be ethically questionable at best, and fraudulent at worst. That's fact.
My opinion on the idea is that it may be a fun little piece of dlc, but it would take a great deal of time and energy to code and balance, for a feature that quite frankly isn't necessary to the story or the type of game that they are trying to make.
Is there a possibility for pvp in the game? With friendly fire being possible, yes. Does there need to be a specific arena dedicated to pvp just for the people who enjoy that type of gameplay? I don't think so. I don't agree with or like the modern trend of throwing competitive multiplayer into every game regardless of style or story needs. In my opinion it would be arbitrary and gratuitous to just throw in a pvp arena because some people want it.
On the other hand, if there's interest and the devs want to do it after the game has been released, cool. I'll probably even give it a go. If you or any other modders want to make one, feel free to go nuts, that's what the editor is being released for. But I've seen too many single player and co-op games be released well below both anticipation and promise in terms of quality because of forced competitive multiplayer to want to see the same happen here.
