Talent lowers DPS output by x%, increases mitigation and avoidance by y% and increases threat by z%.
How complicated is that compared to what the warriors are getting?
Yes they are similar, very much so with the "Out of Combat" being the big separator between the 2, they aren't 100% similar but they are very similar.No, they aren't similar at all solely because of the fact that you can not switch on the fly from tanking to dps during combat. All Gladiator Stance does for a Protection Warrior is save them the 3-5 seconds of switching specs and gear to become a damage dealer that doesn't have the important personal and raid cooldowns of Arms and Fury. This is different from old Cat-Bear where you had all of the important tools for both forms and could use them as you wanted when you wanted.
Gladiator Stance is more similar to WotLK's talent trees for DKs in that each spec had a viable tank and dps option but not a good mix of the two.
They don't need gladiator stance any more than Guardian spec needs a new Gladiator form. That is the whole purpose of dual spec.
If they are doing this, they should have just given Warriors a 4th spec and called it gladiator SPEC and had it based on sword and shield attacks. Not a stance to effectively give them tri-spec, especially after the feral split.
Edit: That would actually be kinda cool.
Bring on Gladiator Form for Guardian spec so we get a new melee DPS spec that plays different than cat form some =).