I'm personally hoping for more customization options to differentiate online players from each other and a higher max player limit, but I'd settle for a more stable frame rate. (thatvideogameblog.com)
I say mostly stable frame rate because there are random moments of heavily noticeable slowdown. (cultureofgaming.com)
From my experience it does have a pretty stable frame rate, but it does struggle when there were a larger number of enemies and / or health issues. (thevitalounge.net)