Not really much point in arguing such a speculative "what if?" scenario.
"What if they stop adding jobs altogether?"
"What if they end 14 after Shadowbringers?"
"What if they start removing jobs?!"
From everything we do know and have been told they plan to continuing adding new jobs as evidenced by them adding more normal jobs in 5.0 after BLU's arrival in 4.5 and also said that limited jobs open up jobs that otherwise wouldn't work/fit in 14, implying they intend to continuing adding jobs while using the limited job system to add ones they feel otherwise wouldn't work.
We can argue weather or not limited jobs are a good idea, but no sense in adding things like "What if they only add limited jobs?" when nothing they've said even remotely eludes to that.