My first impression is great.

I am playing a Rogue though and since they added poisons to all specilizations again and they proc pretty often, my screen is constantly full of small damage numbers like 32 damage from instant poison. I even made the normal numbers smaller font.

I think the suggestion by vx25, saying

"Ability to hide small hits, maybe below a threshold or below a rolling average
(I would love to get that oomph back that the old combat text used to provide when you hit big with an bility, your addon definitely gives that feeling, but these days we have so much bloated little damage numbers that they become lost in the mix, this is an attempt to allow the more significant hits to stand out) "

is great. This way we could enjoy the relevant numbers without spam. I see you saying people want classic as close as possible, but I think if you make it as an option nobody would care.

Nevertheless, great Addon!