He does have different strumming patterns from what I’ve noticed, he tends to down stroke more. His palm muting techniques are different compared to Brads which is why songs like Papercut sound a bit different and why APFMH sounded different too, he seems to have changed the way he does palm muting on that song though as @LPLStaff pointed out.
Alex just has a different technique compared to Brad and I think he’s a pretty good fit to fill in for Brad personally.
I haven’t really noticed any issues with timing, the song he does seem to mess up a lot is The Catalyst. He always seems to play the wrong chords every time they play that song. (If you can even hear the guitar most shows lol)
Another thing to point out which I think I have before is the guitar tone on What I’ve done sounds horrendous, especially during the solo part it sounds extremely bland and im hoping that gets fixed.
I listened to some songs from both Tokyo shows and mostly EVERY song, the guitars are mixed super low and everyone else is louder. Not just Alex’s guitar but Mikes too, on some songs the guitar volume is turned up but on a lot of older songs like POA or Lying From You the guitars are mixed too low. Same thing goes for a lot of the playback samples, they sounded pretty low these past 2 shows. (Lying From You is a good example of this). This is just personally overall what I’ve listened to and think so far. I may be wrong on some things but this is just what I’ve noticed personally as I am not a professional audio engineer.
This overall seems more like an FOH issue and I hope they fix this soon.