There's some lore of eldar reflexes being good enough to just walk past bullets and kick a grenade mid-air back to the sender. Especially with the new CWE-codex, they are extremely mobile and can run&gun people easily. Dark Eldar too with massive amounts of assault vehicles and fleet all around, as well as units that can ignore terrain and just zip past it. They are easily quicker than any astartes, all of them, but I think the bigger question is how orks will be in comparison.
Well, Yarrik himself said that orks move with surprising grace and swiftness. Which implies that, despite their brutish appearance they aren't clumsy or slow. And if you wanna get picky, they move 6" on the TT, same as most basic infantry.
Because then that ganks travel time, vastly slowing down infantry blobs in assaulting enemy positions or getting back into the fight? Roll and dodge should also be infinite simply for having to dodge heavy weapons or raptor/assault/stormboy spam on your position, just remove any ability to aim, look, or direct your roll/dodge after you've committed. The idea of Orks, Space Marines, or Eldar getting winded is hilarious, but not in a good way. What they should do is something like the overdrive system in Section 8, albeit not as fast. You have a regenerating bar of energy for your overdrive system, where if you're running for 3-4 seconds, you press a button to activate overdrive for absurdly fast movement that lasts for over ten seconds. However you can't shoot, you can't turn well, you can barely jump, and if you run into a wall or fall off something, you're knocked out of overdrive mode. So base running speed for space marines would be something like twenty miles per hour, going into overdrive would turn your speed up 30-35 miles per hour. It wouldn't be useful in combat, just for getting the hell away from something or running to the nearest battlefield because your ride did something incredibly stupid.
This is the biggest part of your above post that I disagree with, "run" is your normal travelling speed "sprint" is for short bursts that's why it's called sprint. There is no "run faster to increase travelling speed", if you wan that RP a bike. See above about sprint "going into overdrive" is a short burst thing not a long distance travel, even marines are mortal and not inexhaustible no matter what some badly written BL book says. .
Get yourself a couple of red stripes tattooed on your legs and you go 10 times faster, that's a fact.
Do you have any idea how much of a nightmare it would be for map design if you could run at 15m/s? You'd be able to close a 60m gap in just 4 seconds without even using a jump-pack. Simply for game balance reasons I don't think we should be running like Usain Bolt everywhere we go. A fast walk or light jog is a good base speed, with the option of a short fast sprint that disables your weapon while you're sprinting.
It never proved a map design problem for Section 8, it was just used as good means of getting into a fight or getting out.
It's too over powered, getting to a fight shouldn't be that easy (the enemy should have a chance to set up ambushes), getting out of a fight shouldn't be that easy either, you should be making strategic retreats to avoid being hunted down or shot in the back.
Assuming there's a sprint function stamina has to be very short for balance sake but from a lore perspective, if Marines sprinted for twelve seconds and then had to catch their breath would make no sense lol. You're looking more at about four or five minutes of full-on sprinting before they may have to stop to catch a breath if even at all. But regardless, I think decent speed but with the largest overall sprinting time is the way to do Marines with Orks being very quick in a short burst with a small but still fair amount of sprinting time and Eldar with the fastest overall sprinting time but with pretty short sprinting time for balance sake, have them cross decent distances but then be unable to sprint for quite a few moments. Eldar run speed(not sprint) could be the same as a Marine in full-sprint to compensate so they would move at a pretty decent pace by default with the sprint literally being just to run past the arc of fire of a heavy bolter or something and get into another piece of cover. This is of course assuming that they are very squishy when put in comparison with Marines and Orks.
God I really get sick and tired of people bitching about how super-powered individuals are "badly written". Please do explain how Astartes not suffering from exhaustion is poor writing? Or how it's a "badly written book" when one of their implants specifically allows them to function without full REM sleep.
