If you want less regrowth prune in the summer, not winter. But what I think the tree could use is some renewal pruning. You would do this over about four years. Each winter remove about 1/4 of the old growth. Cut the major limbs back to one of those upright water sprouts. What grows from there will become your new limb. This will give you new fruiting spurs and improved fruit size.

If you don't like taking out a large limb, remove some of that old pendant wood. It will be replaced by saving some of the resulting regrowth. If you think you must the new growth can be trained to be less vertical. But in a pear the weight of the fruit will pull the new limbs over just like the old limbs are now.

The Fruitnut

Also, when you prune the water sprouts, leave some of the least vigorous ones to allow them to become new fruiting wood. These will take some of the energy from the tree and reduce the regrowth of more vigorous shoots. They will also start producing your best pears most likely.