The difficulty of Normal Content in this game needs to increase.

[Soge01]

I think the idea here is that, if you make the regular content on average a little more difficult, players will be on average a little more competent so you don't run into hard blocks like this the moment something even slightly difficult blocks your way.

Pretty much. This is why we had so many people get stuck in the "In from the Cold" instance. If more instance fights had you actually using your brain to think before acting more players would be less likely to get stuck behind said content.