The problem is, they can't. Keeping both McD and Serg means likely losing both Palat and Killorn between this year and next(maybe keeping Paul) and still having very little, if any cap space for any F replacements(after re-signing the rfas). The forward group is going to lose even more depth in that scenario, and Tampa would really need at least two, if not three of the Syracuse guys to really step up and contribute considerably or find more guys at basically league min to be serviceable.
If keeping Serg over McD is their plan, they can wait until after next year, then ask McD to waive his ntc. If he doesn't, then a buyout could also be on the table, as the cap hits could be managed. 430k the 1st year works nicely with the min cap raise, then 1.9 as the cap presumably starts to increase more in '24-'25. It gets bad for one year at 4.6, then the last three are just over 2. Not saying this should be the top option, but it could be considered.