T-888, saying cripplers are viable in TB without Doc being there is one thing, but trying to hide the fact that they are in-fact completely uncounterable in TB the second you get crippled is another. Being unable to Doc in TB is a huge thing since there's no item you can use to heal crippled limbs (like stimpaks in place of First Aid). You cripple someone's leg = they can't move/chase/kite at all, you cripple someone's arm = they are forced to use a one-handed weapon, you cripple someone's eye = they are cursed with 5% chance to hit until the encounter ends.
The fact of the matter is crippler in TB is an instant win. TB shouldn't even exist, at this point all it is for is griefing, and it only gets in the way of the rest of the game. You can build specific builds around one half of the game that are completely useless in the other, that's what this TB/RT split does. Perks like Bonus Move and mechanics like Sequence are also just leftovers of an old system that doesn't work in MMO format.