Ganging outputs together to improve output-output skew or drive larger loads is the option usually considered. No problems can be expected with ganging from a design point of view of a device. As an alternate solution, one might try to use a high-drive version of the part first instead of ganging multiple outputs together. The high-drive version will be able to drive a larger load than the standard drive part.
The High drive versions are identified with an alphabet “H” in Cypress devices. As an example, CY2305CSXC-1H is a High drive version of its standard drive counterpart CY2305CSXC-1.