Not all the time, just 1/3 or so. I'm not saying I drive my Legacy like Miles Fox used to drive his trashwagons, but sometimes I might. I do try to avoid jumps nowadays though. It's hell on the suspension when you do it with 500 lbs of crap in the back. I've already had to replace a blown shock which was only a couple years old and several heavily worn control arm bushings, which is rough work I don't want to have to repeat. About to throw some Outback shocks on it now so my exhaust stops scraping inclined driveways.
I've driven a number of EJ22 and EJ25 wagons and I'm just not impressed with the OEM clutch power. With the OEM EJ22 disc it's a known issue, but I'm not very impressed with any improvement they might have made on the EJ25. Too much slippage; I'd rather have the engine stall than get hit by that nasty burning asbestos smell of organic clutch ever again. It's probably just fine if you aren't hauling a lot of weight, but I like to use the back of my Wagon like it's a truck bed, and the steep hill neighborhood are likely to be on my itinerary for the foreseeable future. I need a clutch that will grip solidly and keep up with the engine when I need to crank out those high RPMs under heavy load to get the car moving on hills. I know the engine has more power; the weak link is the clutch.
Duly noted on the 6-puck clutches. I've also read that before on this forum. I'm tempted to try it to see if I like the extra clutch power, but I'm worried the car will jump like a jackrabbit when first moving and fight the engine too much when shifting if it isn't done perfectly, making the ride rough as you describe. I'm leaning towards a Stage 2 or higher clutch disc with a non-organic material like carbon fiber or ceramic, but which retains the full radius shape of the OEM disc.
The EXEDY FJD016CB Stage 2 cerametallic clutch disc mentioned in my OP would be a good example, but I don't want to drop $350+ on a part unless it has rave reviews, and I don't see any on the Amazon page for it. I do see on Amazon a similar ceramic disc in a clutch kit by Southeast Clutch, # 15-004, for about $110. The handful of reviews all seem positive and more than one mentions that the clutch pedal feels the same as stock.
If anyone has any experience with non-puck, non-organic clutch discs, I'd be interested to hear about it.