You can, but it's a bit annoying. You add the scorekeeper at the start of the 2-hour period and remove them again at the end. So there's some manual work involved.
I do want to add "pin code" based scorekeepers so anyone who has a pincode can keep scores. That way you can have dedicated tablets for scorekeepers. You type in the pincode and they hand the device back to you when their shift is over. This would be the best solution for you, but I don't have the feature implemented yet
Very good point. I'll get that added! You can change your account info at any time to match your IFPA profile, but I agree it's easier if people know to use that email the first time around.
You're not he first to mention this. It's definitely on my roadmap to let people add specific properties to arenas/machines. As you can guess the arena matching algorithm gets more and more complicated with each change so it's a balancing act for sure.
I know that TDs locally will use the arena timing information to simple deactivate longer playing machines if things are moving slowly.
Of course if you switch from "swiss" player pairings to "balanced" Match Play will let you start the next round before the current round is finished. This really helps to move things along faster.
Head-to-head and group play pairing algorithms are completely separate because... well, because they are quite different in practice. For head-to-head it was simple to attempt to match people with unplayed opponents. For group play it's much more complicated partly because groups are harder to generate, but also because group play has fewer ties. So people would bounce all over the map as they are moved up and down the ladder for matching purposes. That's why I haven't looked at this for group play yet.