Hi there,

1) I'm doing roulettes, support guild members in content and just do whatever brings me fun. Or Level a class to see how it plays.
2) With every patch ^^ But standard content is too easy in my opinion. "Normal" content should be a bit harder, especially expert contents. The gap to savage is way to big.
3) No idea, the first big balance thing I experienced was with bloodstorm. I personally liked it on my main (Bard) and it felt a bit better than it was before.
4) I would say 10h a week is enough to keep it up, you will have phases where a bit more effort is needed. And you have phases where you just need to go online to the raids.
5) If I remember correctly approximately every 3 Months, inbetween is a "small" content patch.

Bonus:

Dungeon are far too easy in my opinion. They tend to produce a lot of slackers that do not know how to play their class as the "minimum" effort is enough to make them. The Endgame Content is right for my gamestyle, but also here I heard some voices who say it is too easy, but for me it is just right. Housing is... yeah, questionable. The houses aren ot placed in open world, so I do not see a reason why they limit the slots. A lot of houses are not used and block the space for people who really want to use it.

I personally managed to get a house, I do not really need it to be honest, but I wanted a house to be able to give it to someone in my guild if anyone really really deserves it. I know i could get a lot of money for it, but I would not give it away to a buyer, I would just give it away to a friend. To someone from who I know he would really like to enjoy the slot and spends a lot of love to it. Till than I use it by myself to play around a little bit and to have a place to stay where I have my merchants