This is honestly the thing that I agree with the most about the problems with these changes. I don't actually care too much about Undying Rage, it's a good defensive ability and all, but I think Cloak of Pain is more fun to use and far more iconic for Marauders and I've pressed Obfuscate like three times in PVP. The trivialization of earlier content by the addition of abilities is something that needs to be addressed and I fully understand cutting down on defensive abilities.
Cutting down on movement utility for a Marauder, however, is a horrible idea. It's the one thing that set the class apart from other DPS classes. Predation being a 30 second cooldown with an 80% speed boost that spreads to the party meant you actually contributed something, something akin to a class having stealth, a control ability, push, or otherwise, something you could use when you needed to that didn't cut into your other abilities by draining your resources that benefited the party in more ways than just murdering people. Every class in the game needs some sort of utility without massive opportunity cost to be even slightly competitive with its peers and aside from being able to skip every few mobs with Force Camouflage (That thing that two whole classes can do with EVERY enemy) Predation is pretty much all we've got. If it isn't a bug, and we haven't seen an update to confirm it is despite other bugs being added to the list, I don't know what's going on over there.
From the Imperial side of things (For sake of not making this list doubly long) Juggernauts still have Force Push, Assassins and Operatives still have stealth and their crowd controls, Powertechs can grapple, the DPS specs for Sorcerer and Mercenary still get access to their healing abilities, All Inquisitors get access to Force Speed, and the list honestly goes on.
Taking away what little utility this class had that made it feel like even a slightly effective contribution to the group despite the utility surrounding it is a really, really bad choice if it is one, and requires clarification if it isn't. I've always felt the pressure to swap away from my favorite class and archetype in the game due to its already limited utility and without even the tiniest shred to contribute other than damage output (Which any class can provide) I'm at a loss as to how anyone, least of all myself, is going to be able to justify playing a marauder in 7.0.