Great question, and pretty common in a new product launch. There are a lot of factors at play which may affect your go to market strategy. In line with Lean methodologies, the simplest approach is the best. You can launch with what you have already and iterate later once you have some feedback and analytics to guide you in what your customers like. It also depends on how you plan to launch. If you are going to run a national marketing campaign and pump lots of money into it, then I would advise doing more research first. Maybe first launch in a small focus group and experiment with various pricing models until you see which one works best.
On the other hand, if you have existing competitors which are not significantly differentiated from your product in feature set, and target the same customer groups, then you can trust they may have already figured out what works, so replicating their model may be the best choice. Happy to discuss more.