In order to escape you can use a magic mirror or a recall potion. Either that or just destroy two for the time being. I got my explosives from a chest and pots.
I didn't have to survive a deadly fall, I just put platforms every now and again. The first time I did that I managed with a cloud in a bottle and a well timed double jump.
Climbing into the sky without a way to negate knockback has a deadly fall.
In essence it isn't any easier to get meteor gear. Also water bolt spawning in the top part of the dungeon also breaks progression.
Also waiting for it to regenerate up there? It is a 10% chance per day.
Besides there is an even more obvious fix to the "problem" you brought up. Make it so only the shadow orbs cause a meteor in corruption worlds.