I'm 99% sure Impending Victory is meant to heal for the same amount as a normal Victory Rush, it's probably just bugged. No need to get your knickers in a twist over it.
Also on the talent calculator on MMO it doesn't actually say it replaces Victory Rush, it does on live. Can't check the Alpha to see if it does or not. But maybe it's not meant to?
Second Wind was dogshite, both in PvP and PvE. Who needs a slow HP regen between mobs while leveling when you have Victory Rush anyway? Plus if you're waiting over 5 seconds to pull the next mob you're pretty damn slow either way, would be faster to sit down and eat. Same thing with Dungeons, you have a healer who heals you between pulls- again pointless.
In Arena, again it was shit. The only way it would be useful is if you could somehow leap away and get out of LoS of someone for an extended period of time during very rare 1v1 scenarios. I can't think of a class that we could outrun for longer than 10 seconds.
You can only really justify Second Wind in BG's where you have a battle mid map or in the enemy base then getting to the next base or fight it'll heal you up, still not a big deal though.
Don't get me started on Inspiring Presence, sucks that we lose the heal when we have to take it for the raid. But in PvP, it would not have healed you the way you think it would. There's a reason no one takes the current Second Wind, and that's 25% Leech.
Safeguard actually looks good. Don't forget we have 2-3(?) charges of Intervene which we can use back-to-back for a long duration of the buff. That's a pretty decent amount of damage mitigation, plus this gives us more rage to play with while not tanking which is my biggest problem with rage from damage taken.
Complaining about the PvP side of things, this talent is amazing for PvP. 100x better than Second Wind ever was.