As an original MTB'er I used SPD's - but then a good friend made me an offer on some Time Equipes, he described them as 'aircraft carriers' and I had them, off him...as I just got more out of 'the road.
Been on TIME ever since and would not ride anything else.
I have thought of riding the road variant of Eggbeaters but TIME..are just outstanding for what is needed for your morphological/skeletal - body !
I find over a beeg ride you can start off with your feet in one position but on the way back they totally change and incrementally on the ride too, so the sideways AND angular movement works extremely well together.
You are only doing yourself an dis-service if you DONT ride Time.
Though, I aint tried the off-road pedals.