If a large amount of unused receiving addresses were accidentally revealed (say 50 or so), is there any risk to the funds that may be stored in that wallet? Assuming the revealed addresses remain unused. I'm wondering if there's an increased risk of reverse engineering the private key if enough public addresses are known.
No, currently there are not hardware that have enough computing power to reverse engineer your public address to extract your private key.
Take note that I say currently, because there's a lot of discussions that QC someday can be a threat. In any case you can read about it in this thread:
https://bitcointalk.org/index.php?topic=5157696.0