Am I being too picky?

Our pool contractors returned yesterday to repair some grouting discolouration where we think the tile adhesive has come up through the mosaic tiles. They seemed to think they had finished and the pool was ready for filling. I’ve checked this morning and there are still some areas where the grouting looks poor. Is it reasonable to ask them to re-do some of these areas or am I just being picky? Will we even notice once the pool is full? (1.3m depth).