The increased difficulty was only felt by the participants. For the audience, they were only concerned about how the participants were faring and if anyone was doing better than the rest.
Unfortunately, the grand concealing formation put in place by the Timeless Flame Sect made it difficult for them to do so. Not only were their perceptions restricted, even their visions were blurred.
This made it literally impossible for them to identify the numerous inscription runes drawn by the participants, much less the level of perfection of these completed inscription runes. This left only one obvious way for the audience to gauge the progress of the participants β by the number of inscription runes completed.
Very quickly, this became the only way for the audience to gauge how well a participating inscription master was faring.