I've always been a little curious about this sentiment when people suggest combo consolidation too. If you're comfortable with the jobs you play, and familiar with a keyboard, pressing 3 different buttons is a negligible increase in difficulty from pressing one button 3 times. This post you're reading now was typed as naturally as breathing, without even thinking about it, and I hit probably 30 different buttons in the process of doing so. If anything, consolidating them makes things harder as it's more difficult to discern what step of a combo you're on, and you lose the option to break a combo on purpose.
But really, I just find it funny when someone says pressing '111' is the last straw that makes a job too easy, as if '123' wasn't just as easy. I don't have any particular love for autocombos for the above reasons, but could it be that they're equally trivial, and you're just fooling yourself into thinking you're doing more work with the latter?
If anything, that the bulk of job rotations can be condensed into one button in the first place is the root of the issue. The real solution is not to distract yourself from that fact with a busywork input method, but to design jobs with more complexity, with rotations that have real degrees of nuance and randomness. That would be more difficult of course, but it's the real answer to the problem.