I have a dark elven mindcrafter.
Started with 16 Le, progressed to a point where I had ~25 learning by level 16.
I obtained detect traps and disarm traps at an early level (9 or so) and used both skills very frequently from that point till the end.

However, the increase dice on both skills quickly went down to just +1 and never went up, despite detecting and disarming numerous traps in all locations, including dwarven graveyard, pyramid, VDDL, various levels of CoC, elemental temples, maze... you get the idea.

At the moment (lvl 45), I have obtained all orbs, got my learning to 37, yet still:
Despite such frequent use, the skill dice refuse to increase.
I think this should be changed to better reflect the character's progression and ability to learn, especially in case of high learning attribute.
Something should be done about the skill dice that simply will not increase even though I have literally detected hundreds of traps.
I disarmed perhaps 10% of those traps, yet even that was enough to increase the disarm traps skill considerably faster than detect.

Detect traps is a very useful skill and I think its frequent usage in the game should be reflected by character's proficiency in it.

On the other side of the spectrum, I have alertness, which I have had exceedingly few chances to train.
As a mindcrafter I virtually always confuse enemy casters and prevent them from attacking me with magic in the first place.
Yet I reached 100 in alertness by level 13 (!), long before I even went to the tower or CoC for that matter.

Detect/disarm traps is but one example, but this pertains to all skills that have been obtained via in-game means rather than possessed from the start due to r/c combination.

So, the final idea behind this RFE is the following:

No matter if the race/class starts with the skill, practical training "in the field" should supersede both racial and class predispositions in how it impacts skill increase, to reflect PC's ability to effectively rely on learning attribute.