Why does Traya's Isolate not allow a revive?

Because being revived is considered a "positive effect" which is prevented.

Positive effects include:
Turn Meter Gain
Health Recovery
Protection Recovery
Assist Attack
Buffs
Revive
Ally Dispel
Health Equalization
Cooldown reduction

Quoted from this post:
https://forums.galaxy-of-heroes.starwars.ea.com/discussion/160410/character-strategy-darth-traya/p1

While not directly stated in game, but outlined in the character profile in the forum, what would you consider a "positive effect"?

"Roopehun;c-1601465" wrote:
Isolate is to prevent one character being helped by other characters.
Reviving is a pretty big help...

That thinking is flawed since boba can revive on his own..

But yeah, it is what it is.

"Roopehun;c-1601465" wrote:
Isolate is to prevent one character being helped by other characters.
Reviving is a pretty big help...

What about night sister zombie? She helps herself

"Treeburner;c-1601477" wrote:

"Roopehun;c-1601465" wrote:
Isolate is to prevent one character being helped by other characters.
Reviving is a pretty big help...

What about night sister zombie? She helps herself

She helps herself... only in the presence of other Nightsisters. So if you kill them all then she is in effect... isolated. Then her self resurrection won't work. Or, Treya can isolate her.

"BubbaFett;c-1601537" wrote:

"Kyno;c-1601460" wrote:
While not directly stated in game, but outlined in the character profile in the forum, what would you consider a "positive effect"?

Personally, I would consider a positive effect to be a buff....... Anything adds a green status effect.... It's just a wording thing.

To me, blocking an ability from working is different.... I'm sure it's WAI, just could be worded better.....

Yes, but there are many other "positive effects" in this game, to say the only positive effects are buffs is a little narrow of a description. Also if it was buffs then wouldn't it just say that.

I don't think that revive should be prevented by isolate. Revive occurs after a unit has died. Once a unit dies they no longer have any negative status effects, which should include isolate. If a unit is isolated and killed, and then a revive is attempted 5 minutes later, that dead unit should not still be considered isolated just because it died while having that debuff. Of course it's WAI, but it doesn't really make any sense.

Can you revive the dead character if another of your heroes becomes isolated (and not the healer doing the reviving)? That would seem to fit with the description of Isolate better.

Well in the case of say Boba Fett or Sion it’s an actual buff that causes them to revive so I can see how Isolate can prevent it. But say GK dies while isolated. Can Jolee Bindo or Visas Marr revive him two turns later?