ITT: Non thief mains talking about thief like it's their mains.
DE is not dead, it's about the same power level, maybe slightly less powerful than before. The initiative gain you had before was already insanely high with Mal7. The extra initiative you gain from entering and exiting stealth quickly is good, don't get me wrong, but the power of constant repositioning and passive initiative regeneration in stealth is always much more useful.
What this patch did was much much more harmful to d/p SA DD, d/p SA Core and SA d/d core which people used to run to counter DE. People think it's a buff claiming "permanent protection and superspeed is so OP" which in my opinion is completely useless traits in WvW. Superspeed on thief is one of the weirdest thing to add since thief bread and butter is gap closers (Shadowstep, infil signet, steal, d/p 3, longbow 5, sword 2, rifle 4, wells etc etc etc). The protection is short and doesn't really fit thief since the real strength of thief has always been resetting in stealth, they will lose brawly fights anyways unless your opponent is much worse than you or play a dedicated zerg build (hammer rev, scourge etc.). Let's not forget that Mal7 in a good DE's hands is going to give perma protection regardless. I agree, the SA traitline has always felt cheap and not fun to play against, but making thief more brawly doesn't work unless they revamp thief completely or buff something else. The ability to reset on the same level as DE while also being able to gap close with SA d/p DD was one of the only hard counters to DE and now it's kind of dead.
It feels like the whole SA tree now is just a glorified side tree for support Specter. Much more useful changes would be to focus on the actual problems.
DE: Reducing Skirmishing Shot damage, increasing Skirmishing shot initiative cost by lets say 1, add diminishing returns or rework the immob spam on Spotter Shot, alternatively increase Spotter Shot initiative cost by 1 or 2, reduce knockdown duration on Blinding Shadows, reduce Mal7 boon uptime by 4s, remove 1 ammo charge on Shadow Meld.
SA: Revert changes completely. Give other classes more easy access to reveal, bake it in to relatively common traits.
D/p: Reduce blind uptime on Shadow Shot to 1.5-2s instead of 5, reduce Backstab damage slightly, reduce damage on heartseeker slightly.