Expanding Limit Break System

[Nurvus]

1 - A cooldown doesn't make it a limit break.
A Limit Break is something you build up for.
It's a) not rotational; and b) not available right off the bat (at the start of dungeon/etc).
The abilities you mentioned definitely do not remotely embrace the concept of Limit Breaks.

And btw, even Final Thrust, a spammable ability, hits harder than Dragonfire Dive. Power Surge only affects Jump and Spineshatter Jump.

2 - Every once in a while Yoshi says stuff that honestly feels either extremely narrow-minded, or sounds like excuses to justify their decisions.
Perhaps he simply doesn't see the simple answer...

First, his teamwork argument makes no sense.
In random groups, nothing prevents someone from using up Limit Break whenever he feels like it. First come first serve.
In high end groups, Limit Break usage is decided as a team, not whenever you feel like it.
None of the above would change with personal Limit Breaks - no teamwork is lost.

Second, although I am suggesting a personal Limit Gauge, I am not removing Duty Gauge - it remains the only way to enable Level 3 Limit Breaks (and perhaps even Level 2).
Your personal Limit Gauge would go up to Level 2 (or perhaps just Level 1).
You would have Limit Break I, II and II as 3 different abilities to use so you can decide exactly what strength of Limit Break you want to use.
You would use up your Personal Gauge first, and the rest from the Duty Gauge - if your personal gauge has 1 filled bar, and the duty gauge has 3 filled bars, and you press Limit Break III, you use up 1 Bar from your Personal Gauge, and the remaining 2 from the Duty Gauge.

Third, Personal Gauge might fill considerably slower (might take longer to fill 1 Level of your Personal Gauge than it does to fill 2 Levels of the Duty Gauge).
There are many ways to balance it out.