Choice of Solution Code

I just saw I made a mistake on the solution code for "easy as japanese railways" by entering one of the crossings as L for loop instead of X for crossing (I did an X for the other crossing in a relevant row, so appearently I knew the rule in principle).

While this is of course entirely my fault, I still feel this highlights that the solution code was chosen clearly suboptimally for checking if someone solved the puzzle.

Since it is a puzzle in which all crossings where given and no crossings were allowed to be put in by the solver, asking to signify where the crossings are does not check, whether you solved the puzzle right. It checks whether you read the solution right. It would be fine to have a special marking for crossings if loop segments where to be entered by their shape, say I,L,T and X as symbols. But saying loop segments are all L except for crossings means crossings are singled out as an exception, which means when entering the solution you have to actively remember to check more than just "L for loop", even though you are otherwise in a habit to not care about the shape of the loop segment.
This would only make any sense if finding the crossings would be part of the solution. As it is, entering the right spots for crossings carries no information as to whether the puzzle was solved right.

To make matters worse, crossings also receive the same symbol as the entirely different blackend cells, making it even easier to forget about them (if there was a distinct symbol for them, you would recall more easily that sybol is for crossings)...