Queen's tears, Billbergia nutans, is one of the ugliest plants in my garden if you are going by leaf type. It always looks to be a sickly color and mottled. But that is the type of leaf it is. It sounds like yours may be about as healthy as they get.
If you are
growing as a houseplant they need lots of warmth and lots of light. Slow down the watering for a period in early winter.