The stock Revo diffs are basically oil tuned maxx diffs - hard use will make them fail for sure - I have even seen racers that swap after every few heats to avoid the inevitable.
The 1/8 diffs for the revo is right around the corner at this point - and they will drop in and out like the stockers and accept any drive shaft kit(including RDL, Tsais, etc.) that works on the stock diffs.
I prefer the revo 1/8th diffs. the bulkless isn't ideal, it takes quite some work to put other oil in the diffs..
I made a suggestion to Jamie to make it so the diffs could be removed out the front/back of the bulkhead similar to 1/8th scale buggy diffs. If they are made like that then you could pull the diffs out in record time :)