Doomfists being I1 is debateable. The intention is clear but the rules for DCCWs say "Walkers" which the DK isn't. It will be FAQed.
And for those of you saying it's useless, try finding a reason to equip Digital Weapons on a Brother Champion. Other than to waste 5 pts or "His BFF is a Jokaero".
Strange, but not a Stranger.