A feedback mostly for MI2/S users who are about to / skeptic towards trying Ivan's ROM:
Three days after flashing the 5.4.11 build, I can report that I've faced NO reboots, mic, alarm or any other bugs, no lags or any other minor glitch and generally I am very satisfied with the ROM, which is definitely appropriate for daily use.
Installation method: I Flashed the ROM with CWM 6.0.5.0 and pa_gapps-modular-pico(uni)-5.1-20150315-signed pack. I wiped everything in System 1 (data, cache and dalvic cache), flashed the ROM and Gapps .zip files, rebooted, installed my apps, rebooted again and that was it. Since then, I use the ROM without the slightest problem.
I would like to add that I've never activated TrueDualBoot on my phone, nor changed partition size (at present, I have more than 2GBs free space for apps). Additionally, I haven't tried to install xposed framework.
I also have to admit that I don't use Bluetooth so I cannot say anything about this specific function.
Finally some general comments about the ROM:
I mostly like: its responsiveness, its battery life and the new design
I mostly miss: all sorts of customization options of KitKat (I should to go back to Eclair or Gingerbread versions of android to find such a great lack of customization options).
Last thing: the first boot took a while, since then all following boots are impressively fast, as compared to my previous ROM (KK 4.4.2)
Thus, I recommend the trial of the ROM without second thoughts...