I have experience as well as heard from many other people that these two are the most annoying. I have sat in midtown waiting (jumping between cosmic and normal) and on Doom Terminal in hopes that Lady Deathstrike would show... but NO BANANA! Time ran out and still NO Lady Deathstrike. As for Bullseye I have heard mixed responses. For me it only counts if I am in challenges and not in terminals. I have heard a lot of people having the same problems with Bullseye not spawning in challenges fast enough nor counting in terminals. I understand that you must defeat **Bullseye before defeating Kingpin.**
Also side note... are there other targets besides: Black Cat, Bullseye, Lady Deathstrike, Crossbones and Hood? Because they are the ones I ALWAYS get. I have been playing since the event started and these have been a problem. That and the constant login issues and disconnects like CRAZY!
I know you guy have a lot going on and I thank you for your work. Wish things get worked out before the end of the event otherwise Gaz wont hear the end of it.