Yeah, sweating will improve gravity significantly.
Unfortunately, I don't do that anymore because with my juicer (yeah, that's right, I use a kitchen juicer appliance), the damn thing will clog up every time if I use the softer sweated apples. With my appliance, I have to use fresh crisp apples or else it's an enormous PITA. So, I get a little lower OG juice, and then add a couple two or three ounces of sugar IF necessary to bring it above 1.045. Which, this year, I didn't even have to do that. Depends on the apples, and the season, etc. Last year I only got 1.042 if memory serves, so I should have added a little sugar but didn't. This year if memory serves I got 1.047 and I was happy with that.