There is still potential and lately i have seen it in a stage or two, regarding Kruijswijk. Age therefore can't be the main problem.
Dismissing a cyclist of such calibre is the easiest thing to do but then what. At minimum you need to find a replacement. They for sure got lucky with Vingegaard but it is not like that can happen each year. It usually takes a couple of years to get to the same level.
Long story short manage Kruijswijk better and the results of that will come on the Tour. On the other races you are sending Roglič more or less alone anyway. Couple of youngsters to support him, at best.
Dismissing a cyclist of such calibre is the easiest thing to do but then what. At minimum you need to find a replacement. They for sure got lucky with Vingegaard but it is not like that can happen each year. It usually takes a couple of years to get to the same level.
Long story short manage Kruijswijk better and the results of that will come on the Tour. On the other races you are sending Roglič more or less alone anyway. Couple of youngsters to support him, at best.