Headlines:
Emp-breaking champs wreck havoc over WOE! People go OMG over this matter!
Seriously speaking, if recalling is your only concern here, I really think its not a big deal. First off, Recall has at least 5 minutes cooldown, which means they can't repeatedly use it. Secondly, recall has a fixed cast, not reduced by dex, and items that really remove cast (e.g: Orleans Gloves, Berzebub card, Dark Lord/Dark Illusion Combo) seriously puts more than half of the damage power of the character to oblivion. Damage reduced by half in WOE, meaning to say no 1-hit asura hitters and drunken master TSS spam. But even with the said cut-down, Sinx still has the best damage output only rivaled by better tactics of other players. Oh and by the way, what good can backslide give our Sinx anyway? Michael Jackson their way to the emp room? Sinx got cloak, EDP, more weapon modes than any class, good HP mods, best damage output (fastest emp-breaking ability), best movement speed rivaled only by windwalk, and et cetera, et cetera. But despite all the good qualities, people still get the motivation to complain. If you look at it carefully, other classes got it worse.
Asking more would be selfishness in my opinion. WOE - no knockbacks. Backslide, knockback = do the math. Snap = unusable without Fury, limited only to a specific angle and area, can't jump over walls, and particularly useless to those who are unskilled. Not to mention they can't relocate in a stunlock. Backslide could easily pull away from that, and so does High Jump. In a particularly chaotic environment like WOE, chances of a champ being able to pneuma himself against a skilled range class + a whole other bunch of mobs is reduced to 50% or lower. Unless that particular champ has well-funded equipment, then his only remaining option is to either fight the mob + stunlock off, or find some other way to avoid taking damage. The chances of survival is only raised by a little, and if you look at it carefully, you can count in your hands the number of champs with the ability to do so.
EDIT: Some people were overjoyed because their TKs leapt over walls like a shaolin monk in a 70's kung fu flick. They literally took the emp in seconds. However, it only placed the advantage to those who used their TKs for WOE. But what about the other classes? I mean, its like trying to catch a slippery frog in a mossy swamp. Think about the situation of all classes in general, and not what only benefit ourselves.