I don't have any reason to think that you should be worried about anything in particular.
Like I've said a couple times: my admin practices (on a platform like this where uptime is key) are to run third party code very lightly and sparingly -- I don't know anything about where you get these plugins, who writes them and how well they're debugged before they're packaged and released; but I'm very much a minimalist in this respect.
While working as an admin, 3rd party code was basically the bane of my existence and responsible for about %94 of my problems. The systems themselves and the server code they run is usually quite a bit to manage in itself. Start adding in 3rd party apps that have dependencies and questionable quality-control, and it's a matter of time before you're spending more time fucking with BS code than with the system itself.
I'm probably just jaded cos I'm pretty burnt-out on being an admin, even though I didn't really do it very long. But I did learn a few things; and of of those things is: minimalism is a good thing, for many reasons.
It's your box. Really as long as your backup system is solid, fuckit, start tweaking the kernel code for all I care, aside from loss of access to the site..