No. As far as I know, there have been no changes to any features with regards to the Vim bindings in Obsidian.
As far as I can tell, it is simply provided through Code Mirror’s Vim bindings, and that is not being developed on the Code Mirror side.
The workaround right now - if you want to use your system clipboard - is to use Copy, rather than Yanking. You can Copy just fine in Normal Mode, and it copies to the system clipboard. You can even Copy when using a Visual selection in Vim mode.
I’ll say it again to be clear: If you are actually having trouble Copying (Ctrl-C), please specifically say so. Copying (Ctrl-C) should work. Yanking (y, etc.) will not go to the system clipboard. Copying should.