No, I haven't changed any of the Pokémon's numbers around. They're still the same as what they are in FR/RSE. I have made an updated header file for XSE which could go with this patch quite well.
As to a public release, I'll make it privately available certainly... with pretty much anyone I know welcome to use it. However, people must demonstrate a capability to actually use the patch in my eyes before i'll let them have it, and if they try to repost it, I'll have it yanked.
For the record, I think you are capable of making use of such a patch, so you don't have to worry on that count.