Change Wake-Up Proxy functionality
SCCM should change the Wake-Up proxy functionality so that it doesn't cause MAC flapping. IBM BigFix and IE are able to use WOL forwarders which are very reliable, and they don't cause issues on networks that use Port Security. The Wake-Up proxy idea is great, but in practice it falls short because many large networks just can't use it. It's incredibly important to have a reliable WOL tool, and Microsoft really needs to step their game up in this aspect.
Jason Sandys commented
As a note here, this wouldn't be a change in the wake-up proxy functionality, it would be a complete re-design as MAC ownership/spoofing is a fundamental part of how wake-up proxy works. Wake-up proxy is fundamentally different from how those other products work so while the ask for a peer wakeup methodology that doesn't use MAC ownership is valid, it's much more than change a change. Note also though that because wakeup proxy does use MAC ownership, it is useful and works for scenarios not involving ConfigMgr tasks or traffic so removing MAC ownership swapping would also remove this feature completely as well.