Are the ROMS & Recoveries safe for the 2E/Z00D model?

I'm having big issues with my stock 5.0.1 Lollipop with my notifications coming through only when I unlock my device, and I read that 5.1 fixed the wifi idle and sleep issues. I'm wondering if these ROMs and Recoveries are safe for me to go ahead and flash on my ZenFone 2E (Z00D) model to see if will solve the issue