in 3.4 you create new templates (generic and vendor specific, ZBXNEXT-3725). In the next step it would be nice to create some other new default templates eg for Linux and Windows, here also use more user macros for trigger thresholds and remove useless items eg cpuload system.cpu.load[percpu,avg1], system.cpu.load[percpu,avg5], system.cpu.load[percpu,avg15]. Also use more LLD applications.