I for one have no horse in this race. I think my apple watch has plenty of battery power. I wear it almost around the clock, including when I sleep. I find just charging it while I'm in the shower and getting ready to work gives it enough charge for otherwise continually use.
With that being said, I don't believe one second Apple closed this "loophole" as a safety feature or as a security measure. They closed it because they want to sell third party the "rights" to take advantage of this port. It was a "oh crap" moment, "we're missing out on revenue".