Does NAUT actually have a full-time dev? Or is one employed as the need arises? If that's the case, perhaps a dedicated NAUT team could be assembled to pioneer and execute future developments. NAUT has been reactive to date (PoS, multipool). There are coin devs out there forging paths and optimism has carried those projects to high market caps. Maybe NAUT can build on current momentum by furthering technical developments (sms gateways, stealth address, blockchain related advancements), while BK focuses on PR and adoption.
Stealth addresses are a big no no imo if you ever want to be accepted as a wall street investable asset. This whole anonymous thing has its uses but its a passing phase in these coins cycle of innovation.
sms gateways is not a bad idea but its for the most part for societies that dont have smart phones yet and at the moment there are being some really cheap smart phones being developed so i see it as a non issue.
You cant just copy innovation , it must be created from the collective ideas of things that work and these things you mention have not proven the test of time so theres no point implementing all the "hot new stuff" in the crypto space just for a quick $ cuz it simply wont work.
wallets for smart phones are going to be worked on soon as POS is implemented
would be nice to have a road map of current and previous developments so everyone knows where the coin stands