EDIT: sorry i overlooked that you have the motus in addition to the lavry, so if you trust them and record more than 2 channels at a time yes more than 2 comps make sense, if you'd mix with outboard even more. if all of that is negative stick to the essence and buy another one or make the jump into something more fancy like 176 or thermionic...
with only a two channel converter and not being able to use outboard when mixing i would tend to stick to two channels of compression.
IF you plan to upgrade converters to more channels and mix with outboard the lunchbox plan is not bad. i personally am very interested in the jml, that could be real promising. also the essence is really more than good as you obviously know, a second one would be great and (relatively) cheap. i nearly bought yours for a second one
but something like a thermionic phoenix which i also have is the bomb although for me it makes more sense mixing than recording.