Luckily this is my most faithful flatground trick so I don't know about specific issues peoples have, but two things I tell people that generally seem to help are:
1) make sure your trucks are flat, or ever so slightly leaning towards the heel side before you do the trick. If its leaning towards the toe side then it won't work.
2) Scoop in the direction you're rolling, not back. Kinda hard to explain, but if you're regular, instead of trying to scoop 'south' with your back leg, but rather scoop 'west'. If you're goofy, instead of trying to scoop 'south', scoop 'east' as thats the direction you're rolling. Make sure the tail hits the ground and gets a pop too.
I think the latter point helps with the landing on the nose or too far ahead issue. I also have barely any front foot hanging on, dunno how some people do tres with their front foot in almost an ollie position lol.