Attic more drafty after roof replaced
In the 60’s all the roofing I put down we used roofing felt 90 lb per roll. Some people call tar paper it is heavy and black and makes a good barrier. I would be guessing since we don’t know what your original vent system was or is now, but with some homes we did just prior to my knees saying no more roof jobs we had to add vents or a complete ridge vent this may be the reason you feel more drafts in the attic but air movement is needed to extend the life of the roof and the structure. New venting may be the same but you just happen to notice because you just had work done and there is bad weather. I would say if you don’t have leaks don’t worry about it.