I`ve used the newest version, with security center marching to 15.1 for like a week, and the detection pattern and detection rate have been changed dramatically.
The behavioral detection module called RealProtect have been applied to the latest version, so there are some surprises when you do some tests of running malware, but sadly one ransomware still bypassed it on my 2nd computer and I had to reinstall the whole system.
Threats can only be detected as "suspect" or "JTI/Suspect!101076"
No more Artimis's presence in the protection.
And the file extension the new product can handle have greatly reduce as well.
Still waiting for Mcafee to improve the cloud detection and Realprotect, for their capability right now are far worse than what it was in old versions.
I have purchased Mcafee Antivirus Plus 1 year unlimited devices. Honestly, one week and Mcafee was removed from the system. It does not matter how much resources it uses but, believe me, it is very heavy on the system! For me the most important part is the performace I will never ever sacrifice performace for the sake of security!