It absolutely drives me crazy how some people think he has always been awful defensively.
13-14 and 17-18 were the only years between 11-12 and 16-17 where he was objectively bad defensively throughout a season (though he played amazing at the '14 Olympics with partner OEL, who is hardly a shutdown mastermind). Both those years came after major injuries - go figure. I've watched almost every EK65 game in his career, and as a Sens fan, Chris Phillips was my favourite D-man to watch for a long time, so I'm hardly an offensive fetishist. He can be up and down but blanket statements like "he's always been terrible without the puck" is just flat out wrong.
For those other prime seasons, he was average to good as a whole for the kind of high-risk offensive force that he was - and for stretches, he was real good - creating turnovers, defending the neutral zone well, creating transition plays, getting back to cover for turnovers, blocking shots (The reason he broke his foot in '17 was from a blocked shot, of which he had a ton of that year because Boucher asked him to do it.). Yeah, he's weak clearing the net and not great against the rush anymore with his pivoting issue, but he still has his strengths.
As for the notion that his decline is imminent and he'll never be the same - well, maybe he won't be the 14-17 EK that had to carry those average Sens teams playing 30+ mins a game most nights - but that doesn't mean he can't still be dominant in a slightly different way. Offensively he's still 1A-1B in the entire league with Burns IMO. Last season after he returned to Ottawa in early December he went on a two-way tear that was arguably better than anything he did in Ottawa (Dec 2-Jan 16 he had 28 pts in 20 gms and +16), and unfortunately injury derailed his season, otherwise he probably wouldn't have stopped dominating and maybe the playoffs would have turned out differently for the Sharks. But most only remember his slow start trying to get used to a new system and new teammates and a new city.
One last thing: over the years he's had many amazing defensive games - but they usually go hand in hand with his great offensive games because he's so good at transitioning play up ice from his own zone. A game where he has a goal and two assists with 6 SOG and a 70% corsi probably means he was getting it done in his own end, too.