Over pruned Chestnut Oak?

[greenfoot]

New to forum, feeling guilty about what I did to this tree, looking for a prognosis on what I'm pretty sure is a Swamp Chestnut Oak (based on bark and leaf). Was trying to open up an Azalea grove that had been taken over by greenbriar and shade. Like the monkey's from 2001 - A Space Odyssey I discovered a tool and went dumbnuts. Work done March 2nd.
Cut too much (at one time) and took too much collar with the branch on several cuts. 8 branches removed mostly on one side. Is this tree doomed to shock and/or rot? A few photos, one with canopy for perspective. Most of the wounds are about 2in diameter, a couple larger.

 

[ATH]

Like you recognized, the cuts themselves aren't great...but the amount removed (looking at amount of canopy left) doesn't look bad.

 

[greenfoot]

Thanks for the feedback. About protecting the collar when pruning (reading into it more after doing this work), is it really more about how quickly the tree will callus and seal? Is removing some of the collar as bad as removing all of it when pruning a live branch?
As an example, there is another swamp chestnut oak next to this one that lost a large limb (probably what would be called a leader branch) near the top of the canopy in a storm, creating a long and large tear into the trunk. The tree has formed a robust callus around the wound, there was no collar preservation in this situation. I've read that some species are better than others at compartmentalization, and Oaks are better at it, perhaps that's part of it also?