Simple tweak, but allow empty buckets enchanted with infinity to delete fluid blocks. It seems to make enough sense: the infinite water bucket is always full, the infinite bucket would always be empty, no matter how much you pour into it.

This would take away the use and value of sponges, as getting the enchantment is often easier than looting an ocean monument.

Thank you for your interest; however, this is not the place to submit suggestions. Please see the subreddit.