Said it already but I do hope something like FFXVI is to what FFXII was for FFXIV. Given FFXIV parallels WoW, not carbon just family like, then FFXVI+ may parallel an ESO / GW2, may even hint at the Arc and Diablo like games, again not carbon. Heavy ARPG.

I don't recommend changing FFXIV so much, it would really bump a lot of players who like that fundamental and just seems like a misuse of resources. However, a new game- I think it would be fun and allows FFXIV to continue to be profitable and available. For those who want new or want more action they also get something, and if they want to return they can. It allows two sources of income. Also the difference makes them complement each other rather than consume, they wouldn't conflict much.

So, yes, but not FFXIV- imo