Preserving author intent is definitely one of the major outstanding problems in collaborative editing. NN's have certainly shown the most promise in performing

Preserving author intent is definitely one of the major outstanding problems in collaborative editing. NN's have certainly shown the most promise in performing human-like judgement calls, but this would be particularly thorny: you'd need to them to resolve toward exactly the same judgement calls on data that may differ for periods of time (in order to keep the data consistency that CRDT's provide).