I certainly see the point of having dead_acute + c making a ç, even though it's totally unintuitive, if for some odd reason it should prove impossible to assign dead_grave + c or AltGr-, to it (none of which would interfere with any existing characters).
But, as pointed out in #919899, then compose + apostrophe + c really must output a c with an acute accent. The one who wants to type a ç using ComposeKey already has compose + comma + c. (By the way, even though your mileage varies, I find the ComposeKey sequences quite intuitive and easy to remember.)
Additionally, if the problem is only with US International, it might be possible to have dead_acute + c creating a ç only on US International, but a c with an acute accent on other (European) layouts.
I certainly see the point of having dead_acute + c making a ç, even though it's totally unintuitive, if for some odd reason it should prove impossible to assign dead_grave + c or AltGr-, to it (none of which would interfere with any existing characters).
But, as pointed out in #919899, then compose + apostrophe + c really must output a c with an acute accent. The one who wants to type a ç using ComposeKey already has compose + comma + c. (By the way, even though your mileage varies, I find the ComposeKey sequences quite intuitive and easy to remember.)
Additionally, if the problem is only with US International, it might be possible to have dead_acute + c creating a ç only on US International, but a c with an acute accent on other (European) layouts.