Will poison/bleed be ok in 3.0?

I currently play a 3x curse physical lacerate slayer w/ starforge, I understand that bleed/poison aren't the greatest anymore, so is physical damage just garbage compared to elemental scaling now?

At this point in beta: no, not really. Physical damage was fine with the brutality gem and some added chaos scaling. But then GGG decided you also couldn't deal chaos damage anymore with the gem. Non-DoT builds are just way easier to scale and have many benefits (like leech and penetration).
I was actually excited for the 3.0 changes to DoT, because I thought it would give DoT a certain unique role/playstyle instead of just being 'extra damage on top of your damage'. But seeing how it really underperforms right now.. I'm not sure. We'll have to wait till release I guess.