if you are doing a correct 2pt and using your core you will still be effective and not leaning too far forward. leaning too far forward is a problem, but so is leaning too far back, you need to find the balance inbetween and get more comfortable being in a forward seat, not 'leaning forward'
When you work on, what my Coach calls a "Functional Two Point", you learn to stay over your feet, balanced over your feet and you should just beable to "hover" there, without having to work at it.
Meaning, you wont loose your balance easily, you just be positioned there without falling forward, collapsing back into the saddle.
When I do my Two Point, I am balanced over my feet. Heels deep, absorbing my bodies weight. Legs around my horses girth, knee's are not pinching, not gripping. I am slightly out of my tack with my seat tucked under me slightly, activated core.
Upper Body is tall, chest is open and I imagine I am lifting my heart up.
Legs are soft and supple but activated, where every upstride Nelson makes, I am saying to him "Come up to me". Every up and down stride Nelson makes, my knee's are acting like hinges, they open and close, open and close.
Here I am in my balanced or "functional two point" while going down a hill
I know in this picture, it looks like I am in my saddle, but I am not. But I am a little too low for my liking.
Does that help?