It is improving
In MA your water is probably still below 60F, so your chlorine tends to be more stable. Sunlight and nasties are still going to eat some, but daily loss is not going to be as much as in summer.
CYA does drop slowly every month. Every pool is different and the amount of CYA a pool loses during winter cannot be guessed. My pool lost only 10ppm (plus refill) over winter. Some pools lose 30-50ppm. To many factor can impact your CYA.
BTW the difference between the K-2006 and the K-2006C is the size of each reagent bottle. Same tests. The TF-100 uses repackaged Taylor reagents what makes it much more affordable.