Dark souls doesn't have coop shoehorned in, it's designed that way and also you are not being invaded by someone massively higher, they would be within your range. Also, you can just enter the boss room, summon help to beat the invader, use seed from tree of giant. It's no doubt frustrating for you, but not relevant at all.
Anyhow, microtransations work because a lot of people pump money into it, as long as it's just cosmetics and doesn't alter the actual game then I'm fine with it, the second it goes BF2 route, I'm out, plenty of games to play these days.
As for DLC, if the main release has significant content and the DLC tells a new story then again, I have no issue in paying. Holding content back to release in dlc a month or 2 later or doing dlc that spilts a player base is kinda stupid and needs a better solution imo.