Anybody switch from a haybine to mounted disk mower

Been mowing and conditioning (chevron rollers) 60 acres of mixed grasses with a NH 10' haybine for years. Wondering about changing to a three point mounted disk mower without conditioning. Anybody had experience doing this?

1- Will drying time really be affected in grass if I don't condition? I ted everything now after mowing.

2- Can you go too slow so the hay is actually recut before its ejected out?

3- Have you been able to mow faster with the disk mower?

4- Mow with a JD2640 on hills now with haybine. Would a 9' disk mower require a heavier and more HP tractor?

TIA  Lee

Anybody switch from a haybine to mounted disk mower