While the number of greater charms available per week was recently increased from 3 to 5 and this is a nice change it misses the pain point of bonus rolls in T14, namely the time required to obtain the 90 charms and the lack of enjoyability and/or multi-point viability of any existing methods.
I'd like to suggest that lesser charms be added to heroic dungeons as a reward alongside valor points. Allowing the quest completion to reward all level 90 characters on the account with bonus rolls would also be a very nice bonus to those who like to play alts and don't have multiple accounts.