I have been playing since 1.0 and 2.0 launch and I, too, still have entire areas of this game that I have not fully tapped into. Never quite got into PVP. Never deep dived into Chocobo Racing, breeding, etc. Still have a crap ton of rare fish to catch.

4 months in between patches is perfectly fine, considering the game has grown 500% in size since launch and QA is an additive process.