I was a premium memeber for years and a grew fond of the top 10 openeings as I like to keep stats on how I was doing with each openeing to see where I needed improvement. I am still a premium memeber paying premium prices withless premium functionality --- when is the top 10 openeings coming back? I would also like to see a personal openeing repertoire book with +,-,= stats ala the openeing repertoire they use at chessgames.com for each player.
 
The "new" scorebook leaves alot to be desired ----

Yes we definitely plan to add more Scorebook functionality in a future update. This will include at miniumum the same Statistics on the old Caissa website including top 10 openings, and hopefully much more. No plans for an openings explorer right now, but I will add it to the list of suggestions.