well if you dont wanna take the 3 nuts on top and the one bolt at the bottom off.
then go for it. but you could have sold the old shocks and got some money for them.
but the amount of time it took to get the drill, find a drill bit, drill a hole, wait till the pressure is gone, get the sawzaw, put the metal cutting bit on, plug it in, then start cutting, then push the lower half to the side, and then wiggle free the upper half, remove it, then take the bolt out of the bottom and wiggle that free,
you could have removed all 4 bolts, then used a screwdriver to press the lower arm out and free, then pull down and done.
but if your needing to drop a subframe super fast before the owner gets home then I think your way is better if the tools used were cordless. LOL
I actually did this once, the insurance company were towing my totaled Accord away and I was like wait ran inside and got a cordless sawzaw and cut the 4 inch mufflers pipes off the custom exhaust and told the guy now you can have it LOL.
I actually did this again, I wanted all the parts to a Legend moonroof,
took a cordless sawzaw and like 4 batterys and went to the junk yard and cut the top off of a legend and threw it on the wheelbarrel and took it home took me about 45 minutes as cutting thru cables, and wires and rubber tubes took forever LOL
it brings me back to my youth. LOL
p.s. I have the same Dewalt sawzaw with the right blades it can be used to cut down trees, trust me I know