Default Question on downgrade

I originally updated from MI1 to MJ7, which was a stupid move, but just wondering if there is anyway to downgrade back in order to have full root and benefits?

I want to restore my phone and if I can go back, that would be great, because I don't want to go forward because if there is a new upadte it would make it worse instead of better, in terms of rooting.

Please advise