Tubal,
I for one would be happy to pay for this plugin if it natively supported device exclusion.
Until then, to anyone else interested, to exclude iPad from the plugin, change line 157 within the switch_theme function from…
if ($options !== false && !empty($options['mobile_theme'])) {
to
if ($options !== false && !empty($options['mobile_theme']) && !self::is( 'ipad' )) {
This leverages the native is() function and aborts the theme switch action if the current device is an iPad. You can replace ‘iPad’ with any of the other keys Tubal has made available for further conditioning if need be.
Looking forward to an update with device exclusion!
NOTE: To anyone editing the plugin, your update will be lost when the author releases a new version 🙂