One would think that advanced players would welcome additional people playing because that means more money for FROM software and likely more games.
Developers should consider player feedback within the context of their vision. Too many franchises have been ruined when developers try making a game all things for all people. Making Dark Souls II easier might garner more sales. Or it might end the franchise. And it's possible that both could happen (near term gain in sales followed up by a long term abandonment of the series by players). It's a risky bet.
I guess if we lived in a world where the only game available to play was the next Dark Souls game, I'd happily agree with you. But it's a world filled with a lot of gaming options. Dark Souls doesn't fit your bill, there are many other games to choose from.
Dark Souls is a game I really wanted to like and wanted to enjoy. But despite my best effort, it turned out it just wasn't for me. I shouldn't let my desire to want to like that franchise alter the vision of their next game.
This very thing has happened to games that I do like - when such games got the attention of people who want to like a game, if it could be changed just enough to suit their desires & sensibilities, then they could fully embrace it. But when this has happened, it has alienated people like me, the developer's original target audience.