Now that 2.7 has been elevated to release level, in the next firmware please create an option to put the master mono/right source in direct out when loop is activated.
For monitoring purpose I use both monitor and direct outputs (master left and master right). I also use a second guitar in alternative input, turning on a mono loop. With the new firmware the direct out with source master mono/right switches into send functionality, so I hear the raw guitar sound from one speaker.