They play and sing it fine, but for such an iconic song they seem to add little to it. Or alter an approach. In Journey's canon that already is and always was the heaviest song - I remember listening to Frontiers in 1983 for the first time and being gobsmacked by the sheer heaviness of it, this wasn't "Anyway You Want It"- or "Don't Stop Believin'"-Journey anymore (both cracker songs, make no mistake), but something decidedly angstier, darker and more enraged. Back then I thought, Judas Priest would have been happy to have written and played that song, it was so damn intense. (It could have been a song for Queensryche too who shared a similar sense of dramatics with Priest.)
So these guys & the one girl have metalled up a song that already was as close to heavy metal as Journey ever got. Let's just say they do the song justice - you have to be brave to even attempt to cover that number. It's a testament to how good an AOR band Journey were.
But Steve Perry is one of the best singers in the world. Anyone trying to cover one of his songs is in for quite a job. Besides that, as I've already noted, Eva Under Fire, the best I can tell, never meant for "Separate Ways" to be something they expected people to focus on. It appears to have just been just a cover song used as a filler at some of their gigs. At one point, though, a fan in the audience recorded it as a bootleg. It circulated, gained popularity, etc. Finally, Cover Nation got involved with the song and put it on their channel. I don't even think Eva Under Fire was planning to do a video of it, although that's conjecture on my part. For the most part, however EUF only does a few covers. Whether good or bad, this is a band mostly doing originals. Also, many of their songs come out sounding hard rock/metal. That's just the natural direction they've moved toward. Not all of their songs are that way, though.
These are the only two other covers that Eva has done. To be honest, I don't much like either one of these. I think she does best with her own songs. Somehow she must have got pushed into doing "With Or Without You." Because she says in an interview she has never been interested in listening to U2 very much.