I would agree that van fleet appear to be trying to sound more like Zep that Zep themselves did, phasing, timings, warts and all.
However that does not prevent me from enjoying it.
Funny I met their drummer at a drum clinic a while back, at that time I had never even heard their music though.
They come and go, remember Kingdom Come? They were accused of exact same thing at the time but they stuck it out and changed pace a little.