Cracks, Root Latest Rom and Circle Case problems

I have the dreaded cracking Case syndrome and am having to send my Phone back to LG for repair ( 14 days turnaround! How will I Survive) so am going to have to put my phone back to stock I assume, as they may check it even tho they should only replace the plastic. So when I get it back, I was wondering if I will be able to re-root and if there are any problems still with Rooting and the Circle Case?

Anyone have any experience of rooting the latest and the Circle cas, or if you think I need to un-root before sending in?

Thanks