Here is what I've done. Partially because I was curious and partially because I'm lazy.
Status: SS installed switched to safe and running iKream v2 with 214
1.copied the downgrade from 214 to 211 and the ugprade from 211 to 215 on the SD
2. Rebooted into recover and flashed 214 to 211 and right away 211 to 215.
No error and no glitch. Everything went smooth.
Rebooted and what I noticed:
a. SS menu gone
b. iKream started perfectly without any FC
c. Chrome not on the phone
d. From phone statuss:
- sys version 214
-Kernel 11 July 2012
-Build June 14th
e.didn't lose the root
What I did after:
1. Installed SS again and enabled
2. The phone restarted into safe side (so only the menu has been lost)
3. Switched to unsafe to see if it recovers well -> went perfect
4.switched back to safe side and restored perfect
I have no idea what I've done but I reported here.