I wouldn't buy a new ring for the outer just to drop two teeth. But if you rarely use the 52t with the outer few cassette sprockets, it might make sense to go smaller and bring the gear range more into line with how you ride.

Before replacing either chainring make a note of the gear combinations you use and those you don't. Then use a gear chart to see which chainrings will give you the range you need with your cassette. I assume you did something similar to decide on the 34t. By assessing your needs you might find that you'll be happier with a 48 or 46t outer chainring.