Yes Roaches have a more favorable meat to shell ratio over feeder crickets who jump to much. Each feeder insect has it's ups and downs. For firebellies in a mostly aquatic environment that I described with a "feeder bowl" shaped rock and where the toads stay in the water to eat it is perfect. I put the dubia baby-small medium roaches there and sometimes they sit for a minute or two then they run around. The firebellies seem to prefer feeding from the safety of the water and the rock caves they dwell in. They all crowd around and pick them off.
If you have a large land portion with your firebellies it may be different and I might choose the turkistan Roaches that would not hide in the substrate and run around more.
I recommended the Dubia Blaptica for Annaliese because her setup is mostly aquatic with a rocky substrate and because when I tried to feed lateralis to my firebellies they regurgitated them. Calcium dust sticking to any insect is an issue with water and Dubia and lateralis are no exception. The answer to this is to give a gutload 24-48 hours in advance of feeding them off.
I will recommend any of many varieties of roach as a supplement in conjuction with crickets because of favorable nutrition rates. I just happen to have huge seemingly never ending supply of Dubia.