Perhaps you should specify which demographic of players are suffering from the strain from the lockboxes.
Personally, the only complaint I had while opening over 400 of them was that I couldn't open like, 10 at a time as long as I had 10 inventory slots open or something like that. I can't say I feel restricted by the amount of inventory space available to me.
I'm not saying there isn't an issue, per se, but unless I'm the odd-one-out of a sea of people who are walking around with mostly full inventories and retainers, then specifying who this is a burden to might help your argument if you feel the need to open a new topic rephrasing the same issue.
[Edit from later in thread]
So no one can really understand the problem unless they have all craft/gather jobs maxed out to level cap AND have 1000+ lockboxes saved up.
Got it.