I still don't see what the problem is. A druid walking along with +12 to their Spot score isn't going to passively spot a middling, budget stealther who is trying to stealth.
Imagine a level 10 druid v a level 10 rogue:
Rogue: Mouse Hood (4) + Mouse Cloak (4) + Rogue's Garb (3) + DeepShadowStrikes (6) + Ring of Hiding (6) + Amulet of Mask (3) + 13 (skillpoints) + 5 (SF hide, stealthy) + 4 (dex mod)
= 48
Druid:
Helmet (5) + Amulet (4) + rings (budget 3 each, total 6) + 13 SP + 5 (SF spot, alertness) + 5 (wis mod) + 2 (owl's insight at CL 10) + 12 (wildshape feats)
= 52
The druid
instantly spots the stealther in their budget gear if wearing equally budget gear. The Druid can afford to keep these buffs up for 11 IG hours before needing to rest and rebuff.
Let's imagine the druid didn't take the basice spot feats of SF spot and alertness.
They hit 47.
One point less than the stealther. How does that affect detection in practice?
A check is rolled once a round. It's rapidly updated with environmental modifiers but the actual roll is 1d20.
Each round you roll a d20 and add your score. So the stealther rolls and adds 48. The detector rolls and adds 47.
So every round there's a 95% chance to be detected. That hits 100% if the stealther happens to be trying to walk past the Druid.
You'll note that even without that 12 the difference is 36 to 47. To be unable to be detected by the spotter you actually need to hit a
baseline hide value that is 19 points higher than the spotter. That 36 spot will still pop a stealther who hits 54 hide.
I haven't even factored in the
15 points you get from popping an insight and clairvoyance potion. I'm being very generous with my numbers here, too.
It is simply this: ordinarily a detector will always catch a stealther using their short term buffs. But wont catch a buffed stealther unless they vastly overlevel them. This seems quite fair and balanced to me. Spot will always beat hide if you go all out, but you can't just catch every stealther that enters your field of view.
Druid just catches everything with minimal gear and investment because of its unique combination of governing attribute, getting spot as a class skill on this server, spot and wisdom buffs on tap and the new feats. If the new feats lasted rounds, Druid would still be the premier spotter. But they'd have to try to spot people.