I was curious about her Eva after reading stuff on here, too, but had a weird chance to see two performances in one week. One without Ricky (deep discount), and one with (not much of a discount)... so, I was a bit curious to see Elena.
The first time I saw her, a Saturday night, it didn't take long before I thought "OMG, all those Broadway World posters are right. She's terrible, and can barely stay on the beat. What is going on?"
Then I saw her the following Wednesday night, and she was phenomenal, owned the stage, and I was completely floored.
So, I think she's just inconsistent, as it is known as a vocally-demanding role. But I don't think people are wrong about her performance. It just depends on the night they saw her.
Now t/d/b/a haterobics on here.