For the love of God, don't decrease the difficulty of end-game dungeons. Everything before Titan is ridiculously easy, even without gear and even the new dungeons. You do DR runs and afterwards do WP a few times, get some WP/AK gear while you build up Tomes for DL gear. Can easily get about 500 in around 2 hours. I run into plenty of low level players running these dungeons and when I was a low level these were still easy. The Giant Tomberries in WP are a joke and I wish they'd fix them so we couldn't just run through them with no s**ts given.

Also, don't increase the difficulty of low level dungeons... they're easy for a reason. Low levels have to be able to do them and they can't make them hard so high-levels can run them. Lowering stat caps means low levels get capped, too, and even with the stat cap they're still really easy.

As for rewards being calculated by how long a dungeon SHOULD take, that's how they work. They except WP/AK to be done in 20-30 minutes. They expect the new dungeons to take 30-40 minutes (though, some are completing them much faster).

You also can't leave a DF group and join again for a better geared group. You're locked out for 30 minutes and most slow runs take around 30 minutes, so you'd be wasting your time completely...

Not to mention Titan HM DF is the place people go to practice Titan HM because they've never done it before. Join a pre-made group. Titan HM is the only time you should be running into anything being too difficult without good gear, and of course it needs good gear considering what you get for beating it.