Individual Rosters generally only suit bean counters as there is an ability to reduce staffing numbers.
Apart from a couple of duties ie:night or day duties we can currently plan as has already been stated months in advance. With individual rosters we will be unable to plan more than a month in advance and then only from the 20th of the month.
Although I personally enjoy shift work , I do also need to have some stability in my life so I can actually have a life!!
And for those people with children they have to consider childcare arrangements and most Nannies and childminders will want more notice than would be available.
Again I agree with the points about working as a team,you very quickly learn the strengths and weaknesses of your colleagues which is a definite advantage.
The Watch system does have drawbacks but the alternative has far more in my opinion.