The LoC is still sort-of there, it's just that what used to be 'moderate' or 'major' LoC have been effectively combined into the 'enhanced' category.
There was (in my experience) very little practical difference between the necessary deliverables for moderate and major LoC software systems. The list of deliverables for the moderate LoC was slightly shorter, but in order to generate those moderate deliverables most software projects would still have had to generate the deliverables for a LoC major system.... or generate a whole bunch of deliverables explaining how moderate was satisfied without the elements required by major... my experience had been that this was just leading to confusion in project planning, directing work effort, and crafting/reviewing submissions.
I have no insight into the change to basic/enhanced (beyond what is in the new guidance), but this division makes a lot more sense to me and it ought to focus both developers and reviewers on the necessary activities.
