What I've found is that for me, ease of rope removal depends on the tree, but there are tradeoffs in the system I'm using:
If it's a pretty straight tree, with no or just 1-2 branches, I use my Delta or oval quick link. Easiest to move up a tree for me.
If the tree has gnarly bark that catches the rope, or more than 3 branches, I go to a steel screw gate carabiner. A little harder going up, because it's heavier than the quick link, but easier & quicker for me when going around limbs.
If the tree looks like a creature with multiple appendages that's going to snatch you up & eat you, & has plenty of potential for rope hangups, , I go to my Kong Ovalone DNA Autoblock. I named her "Big Bertha," because she weighs almost half a pound! (Obviously, I'm not an "ultra,ultra light" guy!) And requires the most effort to keep snug when climbing. But there's NO WAY that I've found so far where she won't come down when you give her a hefty tug...I just gotta remember to step out of the way when she starts her trip down, so she doesn't give me a kiss on my forehead!
I just feel more secure with using steel to connect my line.
If it's a pretty straight tree, with no or just 1-2 branches, I use my Delta or oval quick link. Easiest to move up a tree for me.
If the tree has gnarly bark that catches the rope, or more than 3 branches, I go to a steel screw gate carabiner. A little harder going up, because it's heavier than the quick link, but easier & quicker for me when going around limbs.
If the tree looks like a creature with multiple appendages that's going to snatch you up & eat you, & has plenty of potential for rope hangups, , I go to my Kong Ovalone DNA Autoblock. I named her "Big Bertha," because she weighs almost half a pound! (Obviously, I'm not an "ultra,ultra light" guy!) And requires the most effort to keep snug when climbing. But there's NO WAY that I've found so far where she won't come down when you give her a hefty tug...I just gotta remember to step out of the way when she starts her trip down, so she doesn't give me a kiss on my forehead!
I just feel more secure with using steel to connect my line.