Runes reforged is... a choice of 6 things???
I played on pbe with the new rune system and the new rune system actually feels nothing short of god awful compared to what we have right now. I won't be surprised if less people play the game because of these changes. You pretty much choose 6 mastery spells(comparing it to current mastery system) and you're done... There is less strategy and thought involved. There is less customization to game play -> less interactive gameplay -> not as fun.
One big reason I feel like ur detrimental to the game is that counter picks will be even more so counter picks. For example, you pick some champion in top lane and then enemy picks a champion that can abuse you. Can you mitigate it with mastery selection? certain resistances, regen or health in your rune pages? no. you get to pick 6 different runes that do things like leave poros in bushes and proc thunderlords.
So my suggestion to Riot about these changes is to scrap them and leave runes as is and rework some other portion of the game because these changes give less choices, make the game less interactive, less interesting and less fun to play. Last year was cool with the plants and new items and stuff... This year is pretty much a stat rework of every champion and less choices on customization of gameplay. I don't see why we would want to switch to it. Just leave free runes and keep the game fun.