It’s not 100% clear yet how they will handle the transition. It depends on your date of arrival, if you can cancel your ‘day 5 package’ now or if you should wait. If you will arrive later than around March 7 or 8, then you should contact your hotel now and request to cancel the ‘day 5 package’.

There is a risk that you need to apply for a new Thailand Pass for technical reasons. It’s not sure, when they will change the procedure to apply for a Thailand Pass - or when they remove the day 5 requirement from https://tp.consular.go.th. Could be March 1, could be sooner.