The aesthetic difference is pretty negligible, but not separating the clozes forced anyone who wants to do one-by-one to protect this note (versus just protected the “one-by-one” field). With separate clozes, people who prefer it all-at-once can have it that way, while those who prefer one-by-one can as well while maintaining their sync in case of future changes that need to be made.
The consistency of notes like this, using hints instead of multiple clozes, is the problem attempting to be fixed. One-size-fits-all solutions need to allow variability or else they don’t fit all.