I do not worry about that because I do not use it for my game. An idea is to morph target the skeletal mesh deforming it while runtime(character creator) and after deforming making it static mesh and attach to socket.
But this can resolve many problems.
I hope i understand this right and its meant that in future we can merge and instance skeletal mesh. What i will never understand, why must every character be scaled at runtime. Did anybody has this seen such fidling’s in Battlefield, Call of Duty and Co? This i only a phenomena for RPG/MMO, and as its say from my previous speaker it causes performance dropping.