[Nexus 7 (2013) General] sfhub:
JSS15R Factory image available in Downloads section (below)

JSS15R OTA available in Downloads section (below)

As first mentioned by henklbr in this post JSS15R is rolling out now.

I did not want to hijack that thread, but wanted to have a simple continuously updated first post that summarizes experiences and consolidates resources like OTA URLs, Factory Image flashing, etc.

You will soon be seeing comments from folks about how JSS15R affects the remaining Multi-touch and Random freeze/reboot issues at the bottom of these threads on google product forums:

Multi-touch - reports of improvement, no improvement, and some worse

Multi-touch (continued) - more reports of fixed / not fixed for JSS15R

Multi-touch (continued 2) - more reports of touchscreen issues

Multi-touch (alternate) - more discussion

Random reboots - no real success stories regarding JSS15R

If you need to refer to the old JSS15Q thread, it is here.

Initial impressions

Just like the previous release we are seeing mixed results regarding the touchscreen, reports of fixed / not fixed. It was verified here that the touchscreen firmware in JSS15R is the same as JSS15Q. Further there were various new reports of no change or worse touchscreen behavior, despite earlier reports of everything fixed.

We have seen this pattern before where some screens are fixed by the touchscreen software and some are made worse.

It is worth a try because some touchscreens will work well with this version of the touchscreen software, but it isn't the solution people have been waiting for that fixes almost all units with one update.

Here are some additional comments:

First report from user roy827 indicated touchscreen is completely smooth.

mega999 reports that touchscreen not fixed for him.

m60kaf reports touchscreen fixed.

Given our past experience with variances in touchscreen hardware, before declaring victory, it would be prudent to wait for more feedback from a range of users.

I looked through the kernel source code but didn't see any touchscreen related fixes.

The only change I could find for kernel build 3.4.0-9e52a21 (the one included with JSS15R) was the change to Qualcomm secure execution environment communicator (qseecom)

It had to do with processing of events. Perhaps the whole touchscreen issue was due to some missed events?

Hopefully things are fixed and I'm just overlooking the change or the fix is in some place other than where we have been focusing our attention.

Change summary:

JSS15Q(4.3_r2.2)->JSS15R(4.3_r2.3) AOSP Changelog.

Mini guides:

adb sideload (install OTA using stock recovery, no need to unlock, preserves user data)

flashing factory images (factory image restore, must be unlocked, option to preserve or wipe user data)

restore stock recovery (if you've installed custom recovery and want to go back to stock)

installing OTA-compatible root/SuperSU (will install SuperSU and fix so that it works with OTAs)

entering safe mode, bootloader, stock recovery (button press sequence can be tricky for fallen android)

Downloads:

JSS15R

JSS15R Factory Image (thanks lords20)

Source: pure stock - Format: flash in fastboot/bootloader

Guide: flashing factory images

Caveats:

requires unlocked bootloader

options to wipe or preserve user data

JSS15Q->JSS15R OTA (thanks roy827)

Source: pure stock - Format: flash with stock recovery (adb sideload) or in TWRP/CWM

Guide: adb sideload

Caveats:

MUST be running unmodified JSS15Q

If you are rooted with SuperSU 1.51 or earlier, OTA will fail near the end. See this post for explanation/fix.

stock recovery does not require unlocked bootloader

preserves user data

JWR66N->JSS15R OTA

Source: pure stock - Format: flash with stock recovery (adb sideload) or in TWRP/CWM

Guide: adb sideload

Caveats:

MUST be running unmodified JWR66N

If you are rooted with SuperSU 1.51 or earlier, OTA will fail near the end. See this post for explanation/fix.

stock recovery does not require unlocked bootloader

preserves user data

JSS15R repackaged TWRP/CWM-flashable

Source: slightly modified stock - Format: flash in TWRP/CWM

Caveats:

this is not pure stock and will not work with future OTAs

this is rooted, with unsecured kernel, and init.d support

odexed and deodexed versions

preserves user data

Stock kernel/recovery (.img for fastboot/bootloader)

stock JWR66N kernel

stock JSS15J kernel

stock JSS15J recovery

stock JSS15Q kernel

stock JSS15Q recovery

stock JSS15R kernel

stock JSS15R recovery

Bootloader

Bootloader v3.14

Bootloader v3.15

Root/SuperSU

UPDATE-SuperSU-v1.55.zip - install in TWRP or CWM for root