you're complaining about the stock recovery and you're talking about custom recoveries saying twrp or cwm is required, like I said they're community recoveries, I presume that installing a custom recovery will void your warranty, either look for one that has been ported or port it yourself. Custom recoveries are different to custom roms, you dont have to build up an entire system as you're editing one partition.
Also you have brought up wifi and audio issues, claiming that it's not a problem with the stock rom when it was a known problem in 6.0 for wifi to be buggy, I've never had issues with audio though.
If you have problems like wifi not working and audio, try downgrading the build you're using.