It's a nice idea OP, but I don't see it happening. There's too much tradition in the Final Fantasy name, including the main numberings. In keeping with your idea, notice how different the promotional screenshot for 2.0 looks. FFXIV's promotional materials feature bright colors and normal text, whereas the promotional shot has a darker aesthetic, and the "Version 2.0" subtitle stands out in neon amber. They definitely understand the stigma associated with FFXIV 1.0.