I’ve just taken a look at the pi-gen script: it does bundle snesclient as standard, but only in “stage 5” which is the full desktop version, not the lite version. As it has basically no dependencies I see no reason snesclient shouldn’t be in the lite version - I’ll raise an issue and we can sort this out next release.
Thanks also for flagging that the install instructions are ropey - I’ll try to take a look and sort that out. To be honest, we’re probably better off just making sure it’s installed as part of the SD image…