Oh yeah, it is definitely too late to make any significant changes. There's a fourth zone that's supposed to be coming, isn't there? The devs are going to have to be really honest about wanting feedback, and they're going to have to be willing to take it seriously enough that they would make changes to future content like this - or at least put in multiple ways that you can go after your relic, rather than just pure FATE grinding for significant boosts.
I agree that it's really simple to provide feedback through the forums - but again, I feel like it would be better if 1) the devs encouraged it and 2) they actually took that feedback seriously.
