Simple rebuttals to your "solutions":
1. Most used button for this game is R2 and L2 (by default)
2. Yep, Option to disable would be nice, or just not press L1 maybe guys? come on~
3. L1+R3 is Mousepad mode for Ps3~ next we'll get complains that activating mousepad causes auto-run and the whole circle starts again
4. Who's being a pleb? Every single button on the ps3 controller is used by atleast ONE function~ wherever they relocate it to, there will be problems and calls for moving it again~

besides guys~ leaving the default R2/L2 config, I've never accidentally activated auto-run~