15% should be removed but i dont have the same feeling with dual attacks.

Im very agree about dual attack, but they already change the RNG seed

old:
any RNG always favor defense team till the end of the game

new:
any RNG always favor defense team, but on mid game RNG seed will change to favor any team who have higher chance to win (I think they did this to prevent violet solo, or rem solo too much)

I experience it as well, for example your team is guarantee win and only 1 enemy left, u will likely always did dual attack, same thing happen if defense team on winning condition, at first I think it just coincidence until it happen too many times, its very obvious

Those 15% res. Is the reason why high eff is a waste sometimes. 

Like 300% eff should have debuff people, not to be resisted by some unit that might have 0% res. 

Basically these 2 are element of surprise or RNG, 

As someone said last year (sadly I do not know where this person commented) but she/he said:

Dual Attacks are mechanics where matches can turn the tides when helpful dual attacks happen. 

So if you are about to lose, your unit could dual attack with someone, and it completely changes the match and you probably win.

Now I never saw people complaining about THEIR dual attacks, but when RNG is against you (and it happens to everonye) you jsut complain the hell out of this game.

I dont say enemy dual attacks that they are not triggering but this is the game and I rather have this mechanic than garantueed dual attack or extra turn gear sets. (Like sw)

Im not sure, but have you ever played SW? Some of the units just keep procing the extra turn set and rot out your complete team and you dont get even a turn.

Nah. If they did it, the battle will just be predetermined (in regular arena, not RTA) and they should just add a "skip" button.
And it's just a small chance. Besides, luck is part of the fight. 

I agree that they should remove it as a baseline stat and in turn buff the dual attack set to a more appealing power level. Maybe even give it the penetration set treatment and make it strong enough to run it as just a 2-piece off set.

Edit: And 15% should be a no brainer. Such a toxic mechanic.

I really hate it when an ally randomly dual attacks with Straze then gets cr pushed and blows his S3 too early when I use him on auto(he is the perfect hero for farming(one shotting bosses))