Lack of storage space is pure stupidity

Crafting materials do not take up inventory space. Also, if you upgrade your personal inventory to the 90 slots you will rarely be pushed to max capacity. While yes I think having a chest in your chamber that you can store miscellaneous purple items in because you like the way they look or because the flavor text on them is intriguing, you are more than able to get around that.

I totally agre there is even a chest already sitting idle in the undercroft why cant we use that!

Agreed, not sure why there wasn't a storage chest, even for 100 items would be greatly helpful.  Often I have armor that we need to level up to use or I have sets of armor only for Ice Dragon fights and whatnot, that I do not want to carry with me.   No matter how much I sell my storage is always half full and I have the full 90 slots.  It's just not enough.

They need to add a storage chest in Haven/Skyhold.  Haven's could be smaller and Skyhold should at least go to 100 items IMO.

Yes, you can use valuable perks to add up to 90 items, but those perks are also valuable for a lot of other stuff. When especially travelling seems to increase odds of Direct X crashes you get annoyed when having to travel to sell stuff and then crash...