As far as I remember, it was always disabled only for Christmas (and New Year) holidays, but never for summer holidays. Thus I don´t think FOW consuption and wear damage are going to be disabled. Also like diamond said, last time it caused some issues and we don´t know if they were fixed already.
The trouble is, that repairs are very inefficient. The base takes 2RA every 20 seconds, and it does not matter how much is the base damaged. If I remember right 2RA are able to repair up to 60k damage, but they are consumed even for repairing 400 damage of Wear&Tear.
If it was possible to set the base to use 1RA instead of 2RA, it would effectively decrease the RA consumption per day to 50% (4320 RA) allowing a Core1 base with 2x storage to last almost 3 weeks without maintenance.
Perhaps a setting to make base start repairing at 60k damage? That would solve the problem too. If you are under threat you could turn this off via a command, i have no idea how it is to mess with flhook, though.