I'll be really curious to see what happens next expansion if another 'non-utility caster' is added. Introducing in new jobs into a role invariably brings up insecurities and turf wars (as we've seen this expansion). Whenever players start comparing subjective experiences around 'job difficulty' to leverage more dps, you invariably see a simplifying rework get introduced. ('Oh, your job is more difficult than all the rest, you say? Well, why don't we just rework that instead of giving you a dps advantage over everyone else.')

The main reason why BLM has been so consistently successful to date is specifically because its players are fairly chill about the difficulty level and don't go out of their way to demand extra advantages for it. It's never been reworked as a result. As a result, the job is allowed to keep building on what it had previously, rather than having to recover from a rework/reset. If this mindset changes, though, the job is very quickly going to come into the rework crosshairs.

We saw this exact scenario play out already with a certain melee dps job and a certain deleted action this expansion. You know where this road leads. The choice is yours.