Why are they giving Ryze a skillshot?
Essentially, we want to increase the highs and lows when Ryze is in a scrap - bigger wins when he’s skillful, as well as better opportunities for his opponents to interact with his gameplay. To do that, we have to build more unreliability into his kit. Skillshots are one way to do that, with his Q the obvious candidate to become a skillshot in return for longer range. We do like Ryze’s brand of close-range mastery, so rather than turn everything into skillshots we’re building clearer power/timing windows into the rest of his kit.
-RiotRepertoir
To that statement I must say this: Ryze is a champion that is played by people almost SOLELY for his reliability. If you're having a bad day with hitting skillshots, or if you're just looking to leave skill out of the equation (to a certain extent) and focus more on strategy, then you might want to play something more reliable along the lines of a Ryze or an Alistar or a Vayne, champions that don't have skillshots but can have kits that allow them to outplay in some situations by timing and positioning.
With that said, giving Ryze a skillshot completely changes his identity. Taking his reliability, and making it less so is just defeating what Ryze is - a reliable champion. Why does every champion in this game need a skillshot all the sudden? Why can't you leave Ryze's Q alone? He's been played that way now for around 5 years and only recently was there any issue with him being too OP and bullying people out of lane. (He was OP before that of course but the recent issues that eventually got patched in late Season 4 were what has started this discussion)
What I'm saying is that giving Ryze a skillshot isn't just a slight change or balance, it is a complete OVERHAUL of his identity in League. Right now, I think Ryze is fine where he is. He has a weak early game with a strong late game. In short, he's balanced. There's no need for drastic change.
Please don't give him a skillshot.
"If it ain't broke, don't fix it"