When the card was first introduced, I actually felt it was a neat idea. I saw it as bronze Sheldon that required both the cards to get payoff. But the more I played and the more I thought about it, I don't think it is a good idea.
Firstly, bleeding is not a good choice for this card. Bleeding is only effective on multiple cards in small doses, like witch hunter executioner or bloody good friends. Same goes for vitality but ST got hamadryads to thrive off the slow points.
Then there is a problem of these cards being useless without a buff. It wouldn't be much of a problem if not that they can be spawned from bountiful harvest and mushy truffle. It is the only bonded card from the expansion that has zero synergy with mushy truffle.
So, what is the solution? I am not sure. We cannot change the deploy into order, I think it makes the card a bit too powerful. I think elven wardancer is a better card. Give it bonded: boost self by 1/2, and you have the perfect handbuff/bonded card.
Source: https://www.reddit.com/r/gwent/comments/qkxyym/watcher_of_the_valley_has_a_serious_design_problem/