You should dig deeper into your market research. Analytics platforms do exist that provide this level of detail. That doesn't mean you shouldn't build another one - the fact they already exist means the problem is validated. But it does make you look like someone just dipping their toes into a new idea, not an expert in this problem space. There is nothing wrong with that - everyone is new to their work/market at the beginning. But you don't want to be raising a big flag announcing it. You need to be differentiating yourself from what exists, not acting as if you are new. And say that you measure A/B tests, don't describe them as if you had never heard the term.
But to answer the question of what we think about the product itself... I kinda despise client-side analytics that make calls out to 3rd parties (even if it is just a tracking pixel). I understand the value to marketers and PMs. But if you want something new in this problem space, send data to the app server and build server-side processing. Not only is that a cleaner client-side experience, it won't end up getting blocked by anti-spyware extensions.
Also, you are shooting yourself in the foot by measuring landing pages. They are already a fairly weak form of marketing - they are early idea validation, not even a real product. Optimizing at this point is borderline bike-shedding. You need these types of analytics when you have a product ready to roll and are optimizing conversions. Landing pages simply are not high value enough to invest this much effort.