I really like the Wizards Vault. I think it opens a lot of possibilities to make steady progress, while playing the game. I agree that how it is now is very restrictive, but I know anet will fix it.
That being said, I would like to take the opportunity to say how I would like it to be, according to MY personal preferences.
I'm not big into any particular game mode, but I do enjoy all of them. Since I dont have unlimited time to play the game, I rotate game modes. Some days I play PVP, other days I do fractals or strikes, others WvW, etc...
The way the daily system is now I have to either choose one or play a tiny bit of all of them. This is not ideal.
For the daily achievements it would be great to have a lot of choice, with several possible achievements per game mode. Lets say 4 for each like it used to be. You would still only be able to complete four per day of course.
For the weekly achievements it would be nice to have more meaninguful goals like: Complete 8 Fractals/Stikes, Win 8 PvP matches, Participate in 5 different Metas, Unlock Silver WvW chest, Comple a Raid Wing. I think these types of acievements would incentivize people to play more, while keeping each possible to be completed in one or two play sessions of 1 to 2 hours.
Another thing is the types of dailies we have right now. Right now I have a weekly achievement to kill 100 awakened, which I think doesn't really incentivize me to play any meaningful content, is just grindy and I'm sure Anet would prefer to have me participate in a Meta. Doing hearts are also not that meaningful since is basically solo content.
That is all. Overall thank you for the QoL added to the game, I am enjoying this expansion even though I didnt have time to play much.