It's always good to hear from you. Yes, you're right: The standard rule of thumb is "1-100", meaning neutrophils below "1" (one thousand cells per microliter) or platelets below 100. Not every doc follows this rule, but in our experience, all of the "experienced" HCL docs do.
Many HCLers have slightly low, but pretty much stable, counts for years. However, the trend in the lyms-to-neuts ratio suggests treatment somewhat sooner rather than later. It's worth noting that your husband's counts still have quite a ways to go, so that may take a while. There are no guarantees with HCL, but I'd expect re-treatment to be in the "one to a couple of years" range, as opposed to either the "couple of months" or the "decade or more" ranges.