You're right. My guy has 16 HR in 183 ABs after the update.
Prior to update - 506 AB's, 52 HR's, 10.2% of AB's resulted in HR
After update - 183 AB's, 16 HR's, 8.7% of AB's resulted in HR
So there has been a decrease but he could still be servicable. Plus my team is bad right now, so he's probably playing more than he would elsewhere. I wouldn't expect 65 HR's, but my guy is on pace for 52 over 600 AB's (post update). I'll take it