It also had the advantage of being more elegant than its mirror card Undermine, as it was a simple combination of Healing Salve and Counterspell for the combined price of both of them, and while the strength of the colors meant the ranking here goes the other way, Absorb shows how it's more important to get what you need rather than what is technically more valuable
This became apparent to me this past cycle with Theros mythics Thassa, Deep-Dwelling, Heliod, Sun-Crowned, and Ox of Agonas
Whether it's because R&D is afraid of making a creature card that's too powerful or if it's likely to break the format if they push it too far, I'm not sure
Keen Sense would be perfect, and other cards such as Heightened Reflexes could also fit in and feel right for the theme of the deck
As much as the hype is growing, MTG x FF products have a massive downside that could easily backfire