I would like to implement the Facebook Conversions API in order to be able to upload some business conversion events in hope to better optimise the marketing campaigns. Currently we have a (google-tag-manager) pixel setup which is a little bit "simple" and constrained. Via the conversions-api we could provide
a) more conversions as the pixel might be blocked by some people
b) more context around those conversions ~ stuff like product category / current price / and other context points which are not available via the pixel.
My question: The FB documentation is quite insistent that you should implement the conversions-api as a complement to the pixel. However - given the situation that our pixel setup would provide more "poor" context information around conversions - would it be reasonable to implement the FB conv-api not as a complement but as an alternative to this?
Meaning - implement all the conversion events via the conversions-api and do not try to "mirror" this setup with the pixel?
Are there are disadvantages to this approach - perhaps somebody can share some advice and their experience?