No, but it's time consuming. I have no idea what your definition of 'pain' is so I can't really answer that. Issues that need to be addressed....
Gas tank will be in the way
Crossmember will be in the way
Coil mounts and shock mounts will have to be redone--might as well cut off the rear frame and build a new one
Longer drive shaft
Longer brake line
Longer control arms/relocated mounts--might as well build a new link setup while you're at it
Tub has to be cut to make room for tires
If you want it to look right, you need LJ-length rocker guards trimmed to fit with the new wheel well and either blank corners or pre-cut stretch corners.
It's more expensive and more time-consuming than it is a 'pain' IMO. I'm currently building a new rear frame for mine.....the nice thing about this is you can define the distance between coil mounts, shock mount location, etc. So you can use a +4" spring to give you 2" over stock. Suspension mounts are done, arm material is on the way, new corners and sliders will be ordered shortly.
It depends entirely on how much stretch you're talking about. The longer the stretch, the greater the pain. Tire size, lift/ride height, fuel tank or fuel cell, axle choice, suspension.....it goes on forever. Every new change requires a new design and lot's of measuring! A 1-2" would probably not cause all that much pain but if you want a meaningful stretch, you should probably invest in bulk Tylenol.
I'm stretching the rear of my '01 TJ 5.5" and the front about 4". So far it hasn't been as much painful as time consuming. Lot's of cutting and grinding, measuring, welding and then lying on the creeper staring.