Wish IB would have even half of that stuff.
IB has no turtle-like parry, which is a godlike ability for guard AND small scale.
IB has no "self healing duel build" since the self healing ability is instantly debuffed by every class AND it is high up in the right tree, so you can't get your damage abilities from the left tree if you need to go that high in the right tree. Good on paper, useless in actual builds.
Wounds/Crit debuffs - on Order knight has it.
Armor debuff is typically not that useful anymore, cause its single target with cooldown and nowadays you can't even debuff mdps classes below the armor cap due to the extreme armor creep on high end gear and potions.
The 10s root M1 any tank have it, not sure why its mentioned as IB power.
Armor tactic is great (but again, only for the IB himself, not for his group or wb), cc tactic is fine on other classes, but IB is last in line for knockdowns, not really used by any IB if at all (its great on slayer and RP).
"Spammable fluff" - there is no such thing as fluff, especially in city sieges. All damage matters, all damage adds up, the fights generally take longer. This is a general imbalance in the game that both Chosen and BG does crapload of more damage than Knight/IB (BO and SM more or less equal), which kinda means an extra 1-2 dps class per wb.
The single target abilities supposed to buff the IB and it's oathfriend, but as explained in multiple other threads before, knights auras and potions are making most of these buffs obsolete. For example I buff one guy with +10% crit, you debuff everyone to get critted by 10% more... which one is more useful?
Take at the little differences like Crimson Death: 40ft FRONTAL hit... while knight's Arcing Swing or the IB's Eartshatter/Rune Etched Axe is a point blank AoE... needless to say which one is better to apply, when everyone trying to avoid the blob and the second you get into the middle you are melting...
But just look at a more simple comparison: with Hastened Doom, the BG increases its AA speed whenever he wants... the IB version is only triggered if the IB is hit by a spell... what if there is no spellcaster? Well, tough luck for the IB... while the BG is useful in every situation, the IB is pigeonholed into different specific cases that is totally out of his control. Due to these so many uncertain factors, low numbers and low utlities, the IB is currently not welcommed in any WB, it is light years away from providing the same value as a knight or SM, but its also miles away from its supposedly "mirror" class as well.