Honestly I think this is undercover one of the best cards in the box. It seems okay, but in all of my play experience with it so far it’s almost guaranteed to heal horror every single turn, it just works out. Just horror soak alone might not be totally enough to justify spending 2 and an XP (it’s pretty good though), but it just has more practical purposes. Obviously it came out with Chemistry Set, and it’s very useful there if you’re going the full asset route. But there is just so many other benefits. I would say first and foremost this is an auto include for Rex. Turning Rex’s ability into succeeding by 1 instead of 2 because you have Steady-Handed makes life easier, plus the horror soak. Deduction 2 is also safer. Grim Memoir is even more likely to draw a card. If you don’t need the healing you can just bump up your success to get more growth on your Ravenous Myconid.
There are certainly extra benefits if you can play rogue cards as well, because of their succeed by 2 archetype. All of the sudden you have safer lockpicks, your weapons are more consistent. Your Quick Thinking is more likely to give you an action. Consistent horror healing for no action cost helps cover for damage taken through your low willpower. I think Trish loves this card. I think Roland could also love this to help cover for his sanity struggles.
If you haven’t really tried Steady-Handed, I suggest giving it a shot, especially if your deck has proactive synergies and don’t have it exclusively for horror soak.