I don't see a good reason why this couldn't work. It's just comes down to dps uptime.

If you take a job like SCH, for example, you have a plethora of oGCD heals, fairy heals, and some fairly powerful barriers that can be applied during phase changes that don't decay in strength over time. These things grant you more dps uptime because you don't have to spend that time on GCD heals. Linking dps and healing is an alternative way of boosting dps uptime. You only start to run into problems when there is a discrepancy between how much dps uptime the jobs get (or if there are discrepancies in raid buffs) - both of which are a problem right now, anyways.