OK for real, Why are there only 4 trade slots.

Maybe 10 or 12 is too many, however there are 8 synthsis spots. I think that should be at least 8 trade slots. I party with my brother and mother and trading stuff back and forth gets tedious. They have the loot list which is very nice. But if you don't look at in time your inventory is filled with all kinds of stuff. Then you have to trade the 6 new items.
Has anyone seen anything about SE going to incorporate more trade slots?