The answer is it depends. Right now I personally would be investing in marketing activity that is strategic. It seems that you don’t/can’t advertise because you were waiting on the rebrand. So you are stuck.
If you believe in the product/service that you have. If you have a point of difference and are needed in the market. And you have the budget to do the rebrand then I think you need to do it.
Lastly if your product can help people, help businesses then you need to be positive and move ahead. Most people expect brands and businesses to keep advertising. It’s what you’re saying and how you’re saying it that is critical