Manual fw update hold through manual update?

I have a Kindle PW 1st gen (5th gen Kindle) running f/w 5.3.6. Due to the recent requirement to update the PW in order to continue connecting to content on "A" I will have to update. I am currently running:

• Jailbreak 1.14.N
• KUAL v2.6
• MRI 1.6.N
• KUAL+ 0.2.N
• KUAL Helper 0.5.N
• Python 0.14.N
• Backdoorlock kual_10 (NOTE: this one is older. The most recent is kual_12...I was afraid to update it but can.)

I think the most recent firmware I can go to on this PW is 5.6.1.1 (correct?). Since I didn't run the update by the deadline (whatever that was) I have to update it manually. 3 questions:

1. Will the jailbreak survive the manual update to 5.6.1.1?
2. Functionally, what will be the biggest "luxury" I will be giving up going from 5.3.6 to 5.6.1.1?
3. Should I update the backdoor hack?

thanks for any input.

Curt