I can totally agree with most of you guys. I have done several test concerning high CPU usage in V5 compared to V4.6. I basically comes down to this :
V5 eats up to 100% more CPU than V4.6 and I get random CPU spikes (no matter if i use 3rd party plugins or presonus stuff). I am not able to play may last projects mixes (taht i finished in 4.6) in V5 as thye sit at 60-75% in V4.6 an totally overload my system in V5! I addition to that i get graphics glitches (Plugins with no GUI) and crashes on the regular.... Very bad release.
I issued a Support ticket and I´d recommend you to do so, too.
The more of us complain, the faster fixes will be rolled out (hopefully)...
For now Im back to 4.6!!!
See Screenshots of my last tests (same machine, same settings ... they all play out mostly the same)