Sure there is.  By taking on the onus of generating maximum profit for the pool, we are incentivized to make sure the pool is well connected (i.e. no orphans or rejects), make sure that shares are consistently accepted at a high rate and provide services which maximize the pool's efficiency (accelerators, proxies, etc..).

With PPLNS, it's possible (and easy) to inject a share here and there which is nearly impossible for even the savviest of miners to detect.

We will not be offering PPLNS.  We strongly believe that all pools should be PPS+.  We'll continue to beat the drum for this with articles explaining the details behind the choice.

TL;DR PPS incentives the pool to operate at max efficiency, which is good for the miners and good for the network.

Sia Asics will not work on this coin because the headers are structured differently.

Luxor is considering this coin.  We'll be in touch.