I think the biggest current example of why “only encounter” doesn’t work is the phantom job system. In contrast to lost actions and logos actions which were primarily “create your own methods of play” phantom jobs feel like they are light augmentation of existing jobs (contingent buffs likes battle bell and occult quick, long nukes like comet or inanugi or just simple flat damage like heroes time)
And by and large people don’t like phantom jobs AND the ones they do like (namely oracle and zerker) are the ones that explicitly do try to change your rotation
In a way the phantom jobs aren’t enough to paper over the gaps in the actual jobs so the problems of the jobs still remain front and centre, which makes OC less enjoyable
The system is still rather unimaginative but you can bet time mate would be more useful and diverse on SB SCH than it is on DT SCH