Hi Andrew
At risk of throwing a spanner in the works, you may want to think about another software option. LR is unable to convert Canon RAW files to jpgs etc nearly as well as the freeware Canon Digital Photo Professional software that comes with your camera (hint: you should upgrade to the latest version which is 4.3.31 via Canon website). If you want the best out of your gear, use Canon DPP. BLP member Ian Wilson tells me many top bird photographers around the world prefer DPP to handle their RAW images.
A key clincher for me is Digital Lens Optimiser which is one of the tools in DPP. It will remove a number of defects including loss of sharpness that are introduced into your image from lens and camera design compromises, and it does it very well using proprietary lens data supplied by Canon (that you have to download via DPP for each of your lenses). If you want to see what Digital Lens Optimiser in DPP can do, I've included a shot of an Eastern Rosella. It's not the best shot and is not completely sharp but you can perhaps see more clearly what DPP can do by looking at a less than perfect image. The panel on the left has had DPP applied and the one on the right has not. All other settings in DPP were identical. You can still export a TIFF of JPG from DPP and further process in Lightroom or Photoshop (which you'll have access to if you buy the creative cloud subscription), to finish processing.
Cheers
Glenn
PS, I'm working on an article for the BLP newsletter (probably Dec issue, subject to the editor's discretion) on basic workflows that will include a DPP processing option at the front end.