Having accumulated 177 lockbox keys from several months of VIP, I thought I'd go and open some lockboxes for a change. Not having done so in ages, the biggest surprise to me was that Cryptic implemented a special UI for this at some point, making sure that the items from your box are represented by larger images and unveiled with as much fanfare as possible (similar to how other games with lootboxes handle this already). When you get a particularly rare item, there's even an angelic choir-like "ooh" sound effect.
Unfortunately this UI change was already the most exciting thing about the whole experience. I complained about Neverwinter's lockbox contents being largely useless in the past, but I vaguely recall that they were at least a little more varied back then, including items like gear pieces, fashion etc. This time around I found that the drops were brutally utilitarian - which is the opposite of useless I guess, but boring. Aside from a single companion, everything else in those 177 boxes was either a refinement stone or an enchantment. For a system that's supposed to entice people with "surprise mechanics", I've got to say that's remarkably uninspired.