i will never see a rune attack i can use anytime as a riposte. a riposte is a unique attack animation with a crit modifier u can only use when getting a parry . saying a rune attack is a riposte is the same as saying “the enemy is staggered for 1.2 seconds, so your regular sword attack is your de facto riposte”.
it is just not as satisfying to follow up with a rune attack thats pretty much always available, compared to a riposte attack that guts the enemy like in BB. Does not need to be brutal, just unique and rewarding. plus an actual riposte would make a great opportunity for more unique builds and runes like for example riposte/counter healing, dmg up stacks like “gain +x% dmg with each successful riposte/counter, can stack, stacks are lost upon taking dmg” and so on. right now parry is just the only instant focus gain thats left from the previous rune spam meta.