To delete or not to delete ?

I'm a heavy equipment operator and mostly run a 2016 Volvo 300 excavator. I've had nothing but issues with the def system and the computer telling me to regen all the time, it's been back to the shop multiple times and has had the whole system replaced and it still has issues. The same for my foreman truck, which is a 2015 F350 with the 6.7 in it, and since the time I started driving that thing, it has been the same way as my excavator, nothing but issues with the def. So after the last issue, my boss had the system deleted and it really "woke" that truck up, better power, better mpg, and haven't had any issues since.