Agreed. Use pins other than 2&3 for LED and shutdown (4&5 have been used by others), and amend /boot/dt-blob.bin lines
to point to your new pins. You can then enable i2c_arm in config.txt to give you access to /dev/i2c-1 on GPIOs 2&3.
Or use the standard pins for the camera, and route i2c-1 to GPIOs 44 & 45 (J6 pins 33&35 on the IO board) by switching them to ALT2 (you'll need to amend the i2c pin usage in the device tree to avoid changing the function on pins 2&3 from output to ALT0).
In either case you'll need to add your own I2C pull up resistors.
Software Engineer at Raspberry Pi Trading. Views expressed are still personal views.
I'm not interested in doing contracts for bespoke functionality - please don't ask.