In the previous year during the time of admission, the selections were really unpredictable. Students with high-end percentile were kept on the waitlist and some students with low percentile were selected immediately.
Even if you take a year gap you’ll most probably stay on the same level as before. If you get into IIM-A, IIM-B you will pass on later and get a job based on no working experience. If you select IIFT Kolkata in the present year you might get a better chance than in IIM as a fresher in the year after. The only advantage you will have is the name and fame of IIM.