These are pretty pointless nowadays, at least if you're buying them. Elixir of Speed VII = 35% haste buff which is usable at same levels you can get ornate, unless you've been passed through a PoJ trial before level 50. Even at level 40 when you cannot wear ornate at all, you can use Elixir of Speed VI which = 30% also.
Furthermore, if you use Steadfast Companion vet AA, it casts alacrity which overwrites Elixir of Speed VII. So either way is better than gloves clicky.
Sure the clicky is unlimited, but baz value for gloves pattern is about 8k, which would buy about 760 Elixir of Speed VII's. And above level 55, the available elixir effects get even better.
I suppose the point is that the potions sold in PoK now change what is or is not viable upgrades.