shroud tension for oversize wire

[asdf777]

I just learned that the original wire size on my boat is one size smaller than what is there now. It's Bristol 29.9, keel stepped sloop.

Original: 7/32" forestay, backstay and upper shrouds. 3/16" lower shrouds.
Now: SS 316 1x19 1/4" forestay, backstay. 7/32: upper and lower shrouds.

Any advice on what to do with the shroud tension? Is there anything else to worry about? The lower shrouds are sagging in waves unless they're tensioned 15% of their breaking strength.



Thanks,
Gleb