Taking that literally, that is your Full Thrust combo from Dragoon and Aeolian Edge combo from Ninja, every other combo does more than just 'add damage'. You could technically add Reaper's combo in there as each hit adds the same gauge.
Again, however, I ask, what can they realistically add? The GCDs for jobs are fixed in what they can do, how often they are used that adding something else is going to throw everything out of whack.
You cannot add another combo to Samurai, for example, as it would just delay your Iaijutsus, unless you want this combo to also grant a Sen, at which point, you have just made a redundant combo. There is similar arguments for every job and, unless they rework the job, I highly doubt you are going to see anything substantial in regards to GCDs. As for oGCDs, again, people tend to not enjoy a button that just does damage. It needs to have another effect or be used as the result of building up some gauge. If you keep adding things in, at what point do they start to feel tacked on?
I highly suspect there is going to be a fair amount of job reworks coming, which is where the devs can go back to the start and build from the bottom up. They have already eluded to this for BLM for example.
As for the claim that jobs that only get updated moves are going to breed complaints, that is going to depend on how they do it. PLD for example, everything they got is just action upgrades, Sheltron > Holy Sheltron, Spirit's Within > Expiacion, even the Blade Combo is just the Goring Blade combo, yet, it still feels good to use. As someone who uses PLD a lot, it still felt different enough and it also bought a different mindset, ie. an extra 3 GCDs we can stay at ranged, Expiacion can be used as a pulling tool when in dungeons as it is now AoE etc. The only thing I wish they would have done was an upgrade for Circle of Scorn.
Whilst Monk was reworked, technically, all Monk gets from 81-90 is action upgrades. SMN comes close as it just allows the use of Gemshine with Primals, MCH really only gets Chain Saw as a new action etc. When you actually look at what was added across all jobs, most are just QoL/action upgrades with a couple of new actions. So, I would not say that just adding action upgrades is bad, as long as, for the most part, they do add something extra to the action it upgrades and not necessarily just damage.