Yeah I agree with @kusabireika.
Having Vali die is more then unlikely, due to the fact that he has been pretty much designed as the Foil to Ise, from the beginning of the novels, and is Ise's ultimate Rival.
Vali might die, during his final confrontation against Ise (assuming that it's going to be a pretty serious fight), but before that happens, I think that he has a plot armor shield that is equal to Ise's
And making Ise take Albion is also unlikely, since it's more then rare to have two Sacred Gear's have the same possessor... especially if it's a Longinus.
After all, there is a reason why Kiba's opponent in the Rating Game in volume 10, was so shocked, once Kiba revealed his second Balance Breaker.
The remaining 4 normal pieces are most likely going to mutate due to the development of the Ophis / Great Red's powers, which definitely contain enough potential to produce such a change...