What you're saying is ''It won't be added because I don't like it''.
"This special attack offers no counterplay and you'll be forced to just sit there and take it for that time."
"I don't think it's going to be added for that reason."
Sometimes I wish you had team PKed at least once in your life. Stuns like that are essential in MMOs. Their timing is important, it's no like you can spam special attacks all the time.
Whip has 15 freeze, ZGS has 20 seconds. It's hard for me to comprehend how a 3-second stun of a dragon spear is such a terrible thing compared to those.
3 second stun is nothing, but if you're pilled by Rusher Team, then 8 - 10 Spears come along with it, which concludes 30 seconds if stacked all together. In Osrs, they do stack, and that makes Pk clan community very crash.
P.S. For example, SV clan is known for DDOS, and for other peoples they are just trash. They split AGS, for 6m split and they congratulate players, who got the split. What is best about it, they don't care even about clan mates, which also are killed, just to get split.