The obvious comparison to this card is Backstab. "It's the Survivor backstab", I hear you say. And Backstab is a kinda-average card: OK but a little clumsy and quite expensive, so the temptation is to think that Waylay fits into that category, but it's a far superior card for many reasons.
Secondly it's "attacking" on the evade value rather than the fight value. There are lots and lots and lots of creatures that have a weaker evade than fight. The above two-cases provide a ton of monsters of which Waylay is a great target for. Almost every scenario has some, many of which provide XP. You'd be surprised what isn't actually elite.
Next is the fact that it's not technically an attack action, nor is it technically doing any damage. This might seem strange, but it gets around certain edge-cases, some of which are niche, but some of which are significant, or common. (You do also need to be aware that as it isn't a "fight", it will provoke if there are other enemies engaged with you. Stay safe heroes).
Lastly it has better icons. Double-anything is usually good, and here we're getting something that matches with our Agility (presumably we like Agility, as we're chosing this). Obvious heroes are Wendy, but it is excellent in Finn also, who can set it up with his free evades.