I'm a huge Andruw fan... My favorite brave ever. I've always thought of him as the best defensive cf I've ever seen, so I looked up his dWAR and compared it to ender and kiermaier.
Ender's best dWAR was 2.6 last year. Andruw only topped this number 4 times in his career. An interesting note is ender beat Andruw's dWAR in his second year.
Kiermaier was at 5.0 dWAR last season. Andruw never came close... 3.9 was Andruw's best. In only 67 games this year, kiermaier has a dWAR of 1.9, which is pretty remarkable.
So, does dWAR have it right here? Is ender close to Andruw and is kiermaier better?
We don't really have complete results as the UZR and DRS models only go back to 2002 because that's the earliest we have the data for it. Now anything before that uses a different metric and while it's good it's not as good as we have now. So you can't really compare it to Andruw's first 5 seasons which were likely his best.
Also another thing to consider is that one year of UZR or DRS data is really a small sample size. It takes about 3 years of data to reach what one would consider 1 year of hitting data. So while I'm not going to say either of those haven't had seasons that compare to any of Andruws. The thing that makes Andruw so damn good is that he did it consistently for a decade. That is hard.