If it was for me I would have gone for 1/1 on light muzukashii (most 1/2 patterns) and 3/2-2/1 for high bpm or heavy 1/4 triplets based. I mean, it's not like we could do differently. 3/2 pauses are weird to use but 1/1 are the classic pauses you use most of the time in a muzukashii so it's not like you have any other choices to put a break on the map. I think even the 3x1/1 could be as weird as 3/2 since it's like having a 3/1 break with 1/1 notes in it. Plus high bpm songs can have a lot of 1/1 single notes so it doesn't make too much of a difference. A lot of times break guidelines were broken to preserve patterning and rhythmic structure of the map. A mapper would choose to go overboard surpassing the 20/1 limit and put a pause when the rhythm allows it instead of forcing a 3/2 pause in a weird place. Sometimes 3/2 breaks makes muzukashii harder because of the poor predictability of the patterns that are changed to allow the weird pause. In that case if we want to point out the difficulty of a muzukashii, it's better having an increased range of continuous mapping instead of putting 3x1/1 continuous breaks or forcing 3/2 breaks that could make the map way harder and unpredictable. Making rests more intuitive in a muzukashi could have the opposite effect of making things more difficult to players and to mappers. I repeat, for me 2x1/1 on light muzukashii and 3/2-2/1 for high bpm and heavy 1/4 triplets muzu are a good option (you can balance the low bpm or the lack of density with the continuous mapping ensured by the 1/1 in a light muzukashii and increase the number of pauses if the bpm is higher or have dense structure). however for me the main change is to be more lenient with continuous mapping limit on muzukashii by increasing it a bit (maybe 30/1 since a lot of people uses 30/1 on kiai and low density parts).