I think sixteen weeks from first clear of the final fight to gear 1 job is excessive; I may enjoy raiding on a specific job within a particular role, but the ability to replay the fights on off-jobs I enjoy and want to improve on helps keep things fresh and fun, to me.

Going in on an off role, job etc... I don't know as well in what, essentially, amounts to week 1 gear just means I'd be far more of a detriment than if I was able to gear that job alongside the one I play the most and am most comfortable on, as the gear itself will offer a comfortable barrier to where even if I'm playing poorly, it's not necessarily an active detriment to a party.

I'm not saying you should be able to get BiS week 1, but I do think by week 16 if you're clearing the appropriate fights, you should be able to have at least one other job by that point geared out. I rarely end up getting BiS just because I get bored and burned out playing the same job every time, personally.

But, I will say, gear shouldn't be limited to sate the misplaced sense of being special some people have. And I don't think limiting it to the extent it is provides any player benefit to the game.