played against friend's thunder dragon with my trains. made dora and he couldn't get over its 4k defense plus i can use its effect so he couldn't borreload/sword
TD's and Sky Strikers are by far the better match-ups for Trains. Surprisingly Trains can grind out Striker's, and they can just beat over TD's which is hilarious.
As for sky striker, I plan on trying it out, but not until after Savage Strike. Sky Striker's are getting a new link that's earth, which coincidentally works really well with the deck.
Magnet reverse literally does the same thing as xyz reborn. It's also a spell so more use in a grind if you topdeck it and can just go insta into liebe and whatever extra use you could have done with reborn. The extra material is not enough of a benefit imo. Professional and good video and list otherwise.
I found xyz reborn to be fairly versatile. It's more of a going-first recover play, but I do see your point about magnet reverse (which I have yet to test with the deck but it is on my list of tech options). I was more concerned about my opponent outing Dora than bringing back a material for Liebe