It’s impossible to say whether a fully staffed NWS would have led to a different outcome. But, the Texas flooding is a good reminder that government services are generally people focused services, and when those services are cut the consequences are generally worked out on people’s lives:

NWS staff will have an impossible task to continue its current level of services. Some forecast offices will be so short-staffed that they may be forced to go to part-time services. Not only are there fewer forecasters, there are also fewer electronic technicians, who are responsible for maintaining the critical NEXRAD radars. Our worst nightmare is that weather forecast offices will be so understaffed that there will be needless loss of life. We know that’s a nightmare shared by those on the forecasting front lines — and by the people who depend on their efforts.