looking back to me experience, I would agree and recommend #2 - lining. But not with a suede - try some thin and maybe strong leather.
Typically, I'd use kangaroo leather on the projects that require strength and long run term. Yes, it does require additional time to stitch, glue etc, but worst the money and the result.
Other methods, like tan kote, dying etc. - they have some simile moments - will not last long for a simple reason - flesh side absorbs water and other liquids fast.
All mentioned above is a moment of contact with wearer's skin.
Other projects depends on goals..