Add me to the recent Adeline for Zenith swap list.
I think Adeline is a very powerful card and a way to clearly highlight Humans as a theme, but the Vigilance is the big issue that I have with it in a 1v1 format. It just creates so little decision making ala
Brimaz, King of Oreskos back in the day. Adeline is pretty much an auto-include in W/x Aggro and Midrange as a do-it-all package whereas Zenith encouraging sequencing decisions and with more potential lines of play across different decks. I kept Adeline in for a long time as a signpost for W/x Humans, but it's less necessary nowadays with the plethora of support we've got.
Zenith definitely encourages more of a lower curve deck to enable that double-spell ability and I think this will make for more interesting gameplay in the long run. Alongside
Monastery Mentor (which also came back after an extended break) these are unique cards that can supplement the gameplan in a more controlling build with tons of burn or cantrips.
There are only so many obnoxious X/4 bodies I'm willing to include at 3 CMC before reaching the critical mass where Aggro is unable to keep up.