I was disappointed with the Dark Below expansion because it introduced new armour with a higher light rating thus making all of my equipped armour useless.
I spent some strange coins purchasing upgrades for my exotic chest armour & auto rifle. The purple legendary items had no upgrade path so I had to earn vanguard marks & purchase armour from the traders. Typically after spending 120 marks to purchase a new helmet the game decided to reward me with a purple helmet engram in my next vanguard strike.
I'm still waiting for Xur to have IceBreaker & need to purchase another heavy machine gun with the new higher stats.
Truthfully I exoected more content, I would have been happy with a whole new planet to explore but what we got is a chase through three story missions, a strike & ending with the raid I assume to kill Crota.
The Vault of Glass raid is very enjoyable & I'm looking forward to playing the new raid once the UGVM guys have levelled up.
I now have a love/hate relationship with the game I love the gameplay but hate some of the design choices Bungie have decided. I understand MMOs evolve over time & it is still a fairly new genre to me. I just wished all my efforts to date on upgrading my equipment was not wiped away with the release of an expansion. I fully expect when the next expansion arrives Bungie will do the same but like the addict I am I'll still come back to enjoy the gameplay.
However I can see me devoting the majority of my gaming time now to other titles.