How a slight change could open GLA for a future DPS job

[Reynhart]

I did actually gloss over this bit, because I couldn't fathom why you were making this distinction. That is, I figured you misspoke. You still have all your class abilities past 30, no matter what job you are.

Indeed, you still have your class abilities past 30. But like I said, past 30, job skills can make any class any role. In my previous post, I mentionned "Souleater". Imagine a stance where you lose 5% of your HP on any WS to add that same amount of damage to your attack. There, you're a DPS, now.
The only problem is when a job go in Duty Finder at low level, where he can't count on these skills to fulfill another role.

Shield Bash is terrible as a DPS ability, as its potency/TP is absolutely horrendous. Both Lancer and Pugilist have stuns that are off-GCD and cost no TP, so they double as potency/s increases and interrupts.

Shield Bash is not a pure DPS ability, but it'd still be useful to be able to Stun frequently.