So I replaced the coil; here's a quick writeup for anyone with P0352:
Code: P0352 (Cylinder #2 - Driver's side rear coil, closest to firewall)
Part #: 22433AA652
Source: Ciocca Subaru online parts site
http://parts.cioccasubaru.com/p/Suba...2433AA652.html
Tools Needed:
12mm socket w/ extension
10mm shallow socket
Step 1: Remove the strut tower brace (12mm socket) - 3 nuts and 1 bolt.
Step 2: Remove the fuel line bracket that is against the shock tower. There is one bolt holding it onto the shock tower, and you can un-clip the fuel lines from the plastic retainers. This needs to be done to make room for the HPFP heat shield / cover.
Step 3: Remove the HPFP heat shield which is held on by 2 bolts (12mm), one on either side, and alignment tabs that hook into the intake manifold runners.
Now you have access to the driver's side rear cylinder! (albeit it's a tight space, but I have big hands and had PLENTY of space)
Step 4: Unplug the connector to the coil pack; press down on the small tab at the end of the connector and pull gently away from the coil pack - the connector should come unplugged.
Step 5: Using a short 10mm socket and a thin ratchet, remove the single 10mm bolt to the left of the coil pack.
Step 6: Gently use two fingers, one on each side of the coil pack, to pull it out of the cylinder, then guide the coil pack out towards the left due to the tight clearance to the frame rail, as the boot end is plenty flexible, and voila, it's out!
Repeat the steps backwards to reinstall. Make sure the coil pack is secure against the spark plug, and you can check the alignment using the cylinder next to it as a reference.
Start up the car and make sure there is no misfire or any indication the coil pack is not secure BEFORE you reinstall the strut tower brace, heat shield and fuel line clips.
Some reference photos:
