As far as my best Delve Trinkets for my classes/specs I regularly play with according to WoWhead:
Prot Pally:
S-Tier = 0
A-Tier = 0
B-Tier = 4 (Funhouse Lens, Amorphous Relic, Ratfang Toxin & Suspicious Energy Drink)
Demo Lock:
S-Tier = 0
A-Tier = 0
B-Tier = 2 (Funhouse Lens and Candle Confident)
UDK:
S-Tier = 0
A-Tier = 4 (Mechano-Core Amplifier, Funhouse Lens, Suspicious Energy Drink & Shadow-Binding Ritual Knife)
B-Tier = 2 (Sturdy Deepflayer Scute & Smoldering Howler Horn)
Fury Warrior:
S-Tier = 0
A-Tier = 1 (Mechano-Core Amplifier)
B-Tier = 2 (Noggenfogger Ultimate Deluxe & Suspicious Energy Drink)
BM Hunter:
S-Tier = 0
A-Tier = (Mechno-Core Amplifier)
A- Tier = (Suspicious Energy Drink & Funhouse Lens)
B-Tier = 0
Generally, most of the Delve Trinkets imo are that of A-B tier which is pretty standard if you’re looking to gear mainly from Delves, however, Raid and Mythic Plus trinkets usually fare as Best in Slot (BiS) over most Delve Trinkets anyway.
Mechcano-Core Amplifier is a very good Delve Trinket and I can see if some Raid or Mythic+ players use it while it provides exceptional “Equip” procs for a Secondary stat boost.
Although while many of the Delve trinkets are in the A-B Tier category just as the same as Raid and Mythic+, most of them do not necessarily need tuning to be in line or just above Mythic+ balance. This would remove the BiS “chase” from M+ and turn players to Delves as BiS “alternatives” which currently Delves would be the more logical choice for secondary alternatives. Sure, some Delve trinkets might be better for that players class/spec instead of that Mythic+ trinket, it’s all based on personal preference especially if that player is chasing pure BiS items for their class/spec.
If you view your class/spec on WoWhead: Classes > Spec > click on BiS Gear > Trinkets (click on Mythic+ and Delves icon) you will see that BOTH Mythic+ and Delves have trinkets in the same Tier category. Does this mean that the Mythic+ or Delves are better than each other? Not necessarily, although, the BiS Gear for that class/spec and Talent Build also plays a factor since BiS is subjective based on sims for your character.
There are more changes to the Raid and Mythic+ trinkets as per the blue post over Delve trinkets which is a “good” thing to be honest. Increasing the potency on more Delve trinkets to be inline with BiS Raid or Mythic+ trinkets would upset that crowd since Delves are not meant to reward BiS outside of Delve gear which Blizzard has mentioned (unless you’re keeping your character geared through Delve gear only) over Raid and Mythic+. It wouldn’t sit well with those content enjoyers. It would only advocate for players to decrease the reward value even further of Delve gear to be less in line with Raid and Mythic+ (which it already is anyway).
Just be aware, Blizzard is being VERY careful tuning Delve trinkets so they’re not overperforming above Raid and Mythic+. They’re not trying to make a big mistake by promoting the “torch and pitchfork” crowd to take up arms and burn the forums down while trying to dismantle Delves as they trying to already.