6 star Awakening Crystal
Imagine you have just become uncollected and get a 6* mojo. He is of no use unless he is awakened, but there is no option for awakening him, and no assurance in the near future. Such dilemmas have been faced by many Summoners and hence I have a suggestion.
Say a Summoner has 5 six stars in their roster. Now, when they reach 10,000 6* shards, they have an option to use those shards for a crystal called 6 star signature crystal, which includes only the 5 champions which they already have. This means they can use their 10,000 shards to awaken one of their present champions.
Next cycle: when they have 10 six stars they may opt for the crystal again and it will have their present 10 six stars. This continues through every multiple of 5.
From my perspective, the result of duping a 6 star from the signature crystal should be the same as duping through the basic/featured 6 star crystals. Say my Mojo is sig 20 and I get him again from the signature crystal it takes him to sig 40.
This is a raw idea but I feel strongly that awakening and sigging up 6 stars is way too tough for most people.