Of all problems the combat has, number of buttons being used isn't it, do consider that BLM is agreed to be the most complex job in the game, and it uses some of the fewest buttons used, and I personally don't think using more buttons would make anything better, because... well let me give a small bit of context.
I am a tiny woman, I am 157cm tall, which roughly translates to 5'1" and a fraction(like, 0.8 of an inch?) in Imperial, I have tiny hands, and I need to strain my hand to reach 5 on my keyboard's top row while also keeping reach of WASD to move on a moment's notice, more buttons than most jobs use could push into making the game unplayable for me, or at least push me to outright not use a portion of my kit on every job, which would be very bad and disatisfactory to me, far worse than what we currently have
I just don't think that the number of buttons the game uses is the issue, especially when games like GW2 manage to have substantially more complex gameplay than FFXIV with only 10 skill buttons ever(though in part because the weapon swap allows you to effectively have 15 skills with those 10 buttons), rather the issue is extreme rigidity in rotations where there is an optimal way to do most things and save for extremely externuating circumstances, the flow will always be the same, and that this flow tends to be rather similar between jobs, that's, from my understanding, the core of people's complaints.
