Agree about the IVA being easily storable and the Sokol is a good choice I would think as it has a soft helmet.

But, I don't quite get the idea about killing everyone if there is a leak. The point of wearing pressure suits is to protect the crew not inconvenience or harm them. A pressure suit is just added protection against pressure problems in the cabin.

In the article they talk about using the lower half of the planetary suit as part of the IVA suit which doesn't seem to make sense to me. I would hope the part with the most mobility will be the legs as they will need it to walk around.