Evasion isn't the sole issue, but it's partially correct, the thing is, it's an issue because the strongest offense templates (mages) have access to the strongest defense (parry/evade). your evade chance would be reduced if your parry chance is reduced.
Personally, I'd not let evasion be used at all if magery OR Chivalry >50.0,
Nerve strike is enough offense to justify the skill in bushido just by itself, then you get uninterruptible confidence if you use the mastery... which 80-90% of evade-mages do.
Parry still allows you to block 30-40% (depending on 1h or 2h weapon use) of incoming weapon-based attacks... but you and I both know dexers are not the primary reason people have parry, even less a reason for it since archery had their nerfs to AI & moving shot a few years ago.
- in terms of the fight you were referencing.
I was using the 'returning players' understanding of evasion as a means to convey they're not up-to-date with current pvp. They asked @ higgs what his template was as the fight came to an end.
Wrestling has a few advantages on its own to justify allowing all (non-ranged) weapon skills to gain a 2s stun, as opposed to only wrestling.
Wrestling Advantages
1) the only 'weapon skill' to benefit from Parry without giving up potions.
2) No tactics required for either of their specials.
3) can disarm others while being immune to disarm.
Wrestling Disadvantages
1) does little to no damage.
I would advocate for a "stun" replacement to all "Paralyzing Blow" specials but only If the Mastery of the special being used is active.
or example
Paralyzing Blow with wrestling would become a 'stun' Only if Wrestling mastery is used.
a Bardiche would do 'stun' instead of paralyze IF Swords mastery is used.
It would be a trade-off for most templates to make now, because the 'meta' is almost all uninterruptible confidence (bushido mastery). would it be worth it for a 2s stun, instead of the current meta? for some... probably not for all, which is ideally where you'd want it to be.
if it were a 4s stun for wrestling only as the OP suggests, that would become the meta and non-wrestlers, wouldn't be part of it at all.