VLM initially provided 3 (or even 4) roundtrips JER-LCY with a schedule that more or less was tailored around the requirements of business travellers. The once-daily off-peak flight is the result of this far more impressive schedule being cut back because of poor bookings. So it does not seem to be too likely that things would improve with a better schedule (although the facts that well-timed VLM-flights could now offer connections with other AF/KL flights and that the LHR service has disappeared might make the flights more attractive than in the past).