Default [Q] Any downside to rooting other than warranty/knox?

I am considering rooting my Canadian (Rogers) Note 3 (SM-N900W8) in order to defeat the ludicrous SD-Card crippling brought by the latest Kitkat 4.4.2 software update. I'm aware that by doing so the Knox 0x1 counter will void the warranty. What I'd like to know is whether there are any additional negative results besides this well-known one.

For example I've seen inconsistent reports of the Screen Mirroring function being disabled as soon as the device is rooted. Some claim it is more related to the presence of a custom kernel, recovery or ROM, while others insist that merely rooting with everything stock was enough to disable screen mirroring.

If I do nothing more than use CF-Autoroot as described here:
http://forum.xda-developers.com/show....php?t=2466423

...no custom recovery, kernel or ROM, do I risk any undesirable repercussions other than the warranty and Knox issue? Will screen mirroring or any other functions work worse than they did before?

Thanks for any help...