The damage from the Sponge/Absorber really needs to scale as you kill bosses, like the Heart of the Elements does. Their damage-on-hit effect is still in the 20's-50's. I'm afk farming Darksun fragments at the moment and whenever Mothron decides the hover on top of me, it kinda sucks out all of the afk dps.
EDIT
I've also found another bug. With Auric Tesla armor, Heart, and Sponge all boosting my max move speed, I cap out at 128 mph. However, when I use my Counter Scarf dash and finish accelerating, I only cap out at 104 mhp.
Ah, and by the way! Auric Tesla looks amazing! Nice job with that.
Oh... And the Supreme Calamitas' orbs like hanging around for a while after she dies. My poor Goblin Tinkerer...
Another EDIT
Now that I think about it, even the Heart of the Elements is somewhat weak now compared to Legendary weapons. Not that that's something they should actually rival, but perhaps one final post-Supreme Calamitas buff? Or maybe another accessory combination? The Heart's main appeal is the jump speed, slight damage reduction, and the waifus. All the other buffs are actually kind of minor.
I usually find myself spamming Vehemence during the Solar/Frost/Pumpkin events with my waifus giving far too many of my enemies immunity frames. It wouldn't be a problem if I felt they could actually take care of my enemies for me, but as it is currently in order to kill enemies even remotely quickly I have to take off the accessory.