Yes, there were changes to add new features. The style of coding hasn't really changed though but that doesn't mean your modifications won't need to be updated.
Which will be a good thing because it appears some mods will not install on 3.7.0.. Specifically Photoplog Lite downloaded from here and a few others that I have tried
Then again, doesnt 3.7 have it's own member photo area? As long as it offers the basics that would be more than enough for me.
It has a member photo area for individual users, but not collaborated groups or galleries like photoplog. There also isn't a way to covert the two, at least yet.