Im Worried about the space and the stretch of plant. it seems the only the tops are frosting and bulking. Should just carry on as it is, or should i try tie down the cola's more horizontally and defoliate to try get more to even canopy and get lights closer to the lower bud sites
Bending can be risky, I would supercrop the taller tops instead.
Also you'll have to harvest in waves, first the top most buds, then give the middle ones time to bulk a bit, and so on.
You can defoliate but don’t bend the stems now, they’re too strong and may break easily. Let the time do it’s job try to give maximum air and light to your bud sites and you’ll be rewarded soon ;-)