NAT v82 and LE

we have consistently maintained separate batch and tso nuclei for LE and non-LE. after installing NAT v823, it seems there is a push to use LE for everything. What do other shops do? Have you converted strictly to LE for batch, TSO and CICS or do you maintain both? if you have both, is it becasue of performance issues, memory size restrictions or other reasons?
Thank You,
Craig Soehnlin