"Hidden" GCDs need to GO...

[Darrcyphfeid]

How could adding the same audio and visual feedback mechanics GCD skills have to oGCD skills POSSIBLY mess anything up...?

Read the quoted text -> read the content of my post -> understand that the content of my post is about a specific subject that is not what your quoted text is about.

You don't see any potential problems with allowing, say, 3 skills to be added to an action queue, that all have to resolve in one way or another before a 4th action (that can be added to the queue if a "slot" is open), on a job with cast bars? Healers would devour Square en masse.

I want the game to tell me so it doesn't silently fail in the middle of a complex rotation.

It doesn't silently fail. It just doesn't go off and the visual indicator that it didn't go off is that the icon didn't dim out. It's literally the system you want, but in reverse.

If you had your way and they added a cooldown indicator for all oGCD actions while doing an animation, it wouldn't change anything for you. You still couldn't activate the next skill in that 1~1.5 second window, and if we assume that you wait for the oGCDs to light back up (because mashing is wrong, or something), you're still not going to get your 6 action Overheat in because your human reaction time and any potential latency issues will still come into play.

Have you tried any other modern AAA MMOs? I think you'll find that even a modest ping influencing the order in which things happen in combat is an issue that's exclusive to XIV.

I don't see how that's relevant. The fact that I can explain, in detail, why what you're asking for isn't going to help you is enough. Also the part where I don't have any significant trouble doing rotations with a ping twice as high as the one stated in your original post.

Why should we let XIV off the hook for this...?

I'll take XIV and Square to task for literally decades of wrongdoings. However, at some point you need to step back and question whether the issue here is with you, your connection or genuinely with the game.

Unfortunately, this is yet another example of how the devs perceive we play and how we actually play are two very different things. Yoshida has gone on record claiming they balance the game with the expectation it's playable up to 200 ping. By that standard, small input lag isn't an issue. They don't think clipping here or there is a big deal.

See also: Willful refusal to adjust.

The game is playable so long as 1.) you're not lagging to such an extent that your GCD is resetting, actions are registering in a timely manner, and everything around you isn't rubberbanding worse than rival AI in a Need for Speed game and 2.) you can perform mechanics and consistently dodge AoE telegraphs.

Beyond that, it is 100% on us. You can't do a 9 GCD Berserk window on WAR because of your ping? Modify your rotation and adjust. You can't do the OP's 6(o)GCD OH window? Modify and adjust!

People performing worse than the OP - I have no idea how good the OP is or isn't doing, but still - have cleared O4S. They may not have cleared Ultimate, but I'm confident enough in saying at least that.