Believe me. I want to love this plugin. Love the Gui, and the easy controls. I like most things that AD does, and they are a big part of my tool box.
Eos is always too heavy though. I find that I need to have the wet/dry knob at about 98% dry all the time, regardless of the settings elsewhere, or else everything sounds like if you where a bat in a cave. Maybe I'm missing something?
I do play around with the size and time settings, and the diffusion and those others, but i can never find some nice subtle sound. I love dubby echos, and space, but this is too hot to handle...
I have noticed Eos produces some constant low-level noise even when no sound is feeded into it. With just one instance the noise level seems to average somewhere around -105 dBFS, which of course is completely inaudible. In larger projects, though, with multiple instances, the noise level builds up and can easily mess up dithering and may even come audible at some point. So I recommend using noise gate with Eos.
By the way, I tried stacking 10 instances with big and long reverb settings on one channel and the noise came clearly audible. I bounced and normalized a clip, and I must say the result sounds really creepy. If there are any drone/dark ambient producers out there, you might make use of this noise leakage. ;).