What's lacking in Dell PowerConnect Switches is SD-WAN integration, and this is what needs to be improved in it.
All enterprises now move towards SD-WAN infrastructure, and because Dell PowerConnect Switches don't currently support SD-WAN, the product would be replaced, considered a secondary switch, or linked up to a different switch. Integration or support for SD-WAN is what I'd like to see in the next version of Dell PowerConnect Switches.