I have been putting off making a extremely long post about why the vast majority of these suggestions wont fix any issues. But i keep stopping thinking if its really worth laying it all out. The problem is most people put forward quick fix solutions with the thinking that their idea is the best and it will totally work, but the core issue runs FAR deeper then what their suggestion aims to fix.
There is, at the current moment of ED, NOTHING, that will correct the open/solo/pg debate thats raging that can implemented with a simple on off/value tweek/disable enabled in x mode only. The only way to fix the problems is massive overhaul and implementation of dozens of new mechanics and systems. If some one really wanted i could try to sum up the best i can for the most bare minimum needed to have this whole open vs closed things to be settled.
The TL;DR of it is this, currently, this is zero benefit to playing in open over pg/solo, if anything players stand more to loose then gain. The idea that simply increaseing rewards for people in open mode will do absolutely nothing. This same idea was tried before in world of warcraft with warmode, which is optional world pvp that if you opted into you got like a 15% bonus to rewards, however it was quickly found out that it was far better to play the game with out the 15% and be able to go about your day peacefully and with garuntee of not getting ganked and camped, then it was for the 15%. Even if we assume in ED, LTD's sold for 100% more, i could sell 400 credits worth of diamonds in open in my 143m credit mining ship, Cool, except now if i get blown up, i loose all that profit, and cost of the ship to be replaced, and the time it cost to mine it. Or i could just play in solo, and sell it all with a garuntee of the goods making it there for, i and the majority of players, are gonna take the safe route.
At the end of the day, there is not a single thing taht will ever fix this debate with out screwing over one side or the other, without doing massive game mechanic overhauls.