Would it be a huge lift to have a 'spell evaded' popup a la critical hit, sneak attack, etc when arcane trickster or similar avoids a spell? Just impossible to really tell in a scrum and no time to look at combat logs. This would be, of course, a buff to irl morale for rogues with this perk.
As-is its very difficult to see if it worked without pouring over a log and goodness knows you don't have time in a fight.
The value is i would feel like a total cool boss if i saw 'spell evaded' float over my head for a beat 😌
Just bumping this topic per a DM suggestion.
Best I can tell there isn't a bark to the log when you do dodge a spell in any case, or at least I haven't noticed it in the last months, else I probably would have been taking screenshots of them constantly. The perk DOES work mechanically though.