Fun Fact: We had the percentage in the rift progress bars (all of them) during the RoS beta. It was removed for…reasons? It’s part of a HUD. A HUD by design is a Heads Up Display. That means displaying info “at a glance”, not only showing it when we hover over an area with our mouse while we’re also in combat.
It goes along the same lines as the consolidated buffs holder. I can’t see what’s inside the holder unless I either mouse over it or hold down a specific keybind. I want my buffs out in the open so I can see at a glance. But I don’t get that. I get them hidden behind some inane obstacle, and usually they’re shrine buffs, which expire after just two minutes (without the Gloves of Worship equipped or cubed).
A lot of what turns me off about D3 currently is squarely in the usability/accessibility department, not the gameplay department. I usually adjust to the content changes. I can’t adjust anything about the UI though because it’s locked in stone, unmovable, not click-through, and actively hides relevant information from me unless I jump through hoops to view it.
It’s sad to say, but the console versions have a much better main UI display than the PC version does.