We instigate the questions of: (i) whether increasing the number of available channels is always useful for improving the Quality of Service (QoS) (i.e., throughput or packet delivering delay) of Wireless Mesh Networks (WMNs), (ii) whether using more complex algorithms for managing Partially Overlapping Channels (POCs) is beneficial in terms of improving the QoS of WMNs?For the purpose of the instigation, we design a set of algorithms that can be combined to increase the spatial reuse and to schedule efficiently packet transmissions in WMNs. Extensive numerical experiments indicate that using POCs leads not only to a significant increase in network throughput as reported in previous studies, but also to a considerable decrease in average delay.