Doing extra research worth the effort?
Doing more research and get publication are always good, especially if you want to go for PhD and/or follow academia path. However, as you're working full-time, I wonder if you can do intensive research as it's a very hard work. So, my answer is: Yes, it's worth to do more research but you need to reschedule your time and prioritize which activity you want to do most: work or research.