I think if they can not solve this, they should make the soul stones more accessible. Maybe make the soul characters do not count in the collection percentage.
Yes ... the second ... maybe sounds a bit selfish but as a collector I find it very difficult to maintain the collection percentage. Per month I need many soul stones to get the characters in both soul versions. I only get one on the calendar, in boosters nothing. (And I really buy a lot of boosters.)
