What I think is being missed here, is that even though the resolve level will be lower in 1.4, the two players stunning you will have both used a stun already. These have cool downs, they are not infinite.
Also, under 1.3 the two simultaneous stuns would generate full resolve, you could immediately blow your trinket and go at it (master strike, score huttball, etc.), with 1.4 you'll have to wait for the next stun, after the first simultaneous ones, to use the trinket. Under neither scenario are you staying stunlocked for eight seconds.
And if you are stunned for the full eight, keep in mind this requires you to have wasted your breaker, and for more than one person to be hitting you, in which case you're supposed to die quickly.
PS.... but you're a healer and multiple people are always trying to kill u, and getting stunned lets them kill you faster. Ummm.... Where are your teammates and why aren't they stunning, taunting, peeling the dps away from you?