I'd back up a step. Regardless of the actual results of the situation, I think people are trying to extend religious freedom past its intended boundaries. I don't believe anyone should be able to use the "religious freedom" argument as a way to override existing secular laws. So - for example - for many reasons I disagree with the Hobby Lobby decision from a few years back.
To me, religious freedom means you can practice your faith in private or in your place of worship, but you cannot inflict it on the public.
It isn't always possible to separate one's everyday life from practice. And I don't think it is proper for a secular state to make the attempt, either.
But it goes both ways. Religious freedoms are actually personal freedoms that some people choose to label as religious for what are ultimately arbitrary reasons. There is no good reason why other people should be expected to agree with such a personal understanding.
What the people actually do should stand on its own merits and legality, regardless of any claims of faith, and with no attempts at validating such faith claims with the power of state. Therefore, for instance, JWs should be allowed to avoid activities between the sunsets of Friday and Saturday. But it is for them to decide what they want to pursue and to make the necessary arrangements, and they should accept the consequences (such as missing certain events and opportunities). Governments have no more duty to protect religious people from the consequences of their own doctrinary choices than they have any rights to persecute them out of faith alone.
Designer cakes are not IMO part of the public interest. But neither is bigotry manifested as refusal of service. In truth, this is not a matter of law, but of social growth and mutual duty and responsibility.