Please expand:
1) 1 more endowable ability is not that significant
That's why it's in the "little card changes" topic.
It seemed inconsistant for me for a long while.
2) adrenaline is careful not to imply it is a skill
Why not?
3) What do you mean by visual consistency? You probably are referring to the status marker similar to infection and gravity pull.
Gravity pull, immortality, adrenaline, momentum - all these share similar status markers.
Poison counters are different in size.
Why does Adrenaline not imply it is a skill?
1) Because it is not a skill
2) It does not refer to the word skill
3) It does not appear as a skill on any card (unlike Charger or Immortal)
Infection, Gravity Pull, Immaterial, Adrenaline and Momentum are all status effects and have status markers because they are status effects that did not have an easy Freeze or Delay graphic.
The only reason Momentum differs from Gravity Pull, Adrenaline and Infection is that Charger introduced momentum as a skill in addition to it being a status effect.
In terms of visual consistency Momentum is abnormal.