I feel like the current Client we have is more eye candy than functionality. I have a new medium performance tier laptop, i5-8250u and 8GB of RAM and I still have trouble with the client on a daily basis in terms of how smoothly it runs. It often doesn't display my Hextech tab, I have to switch back and forth between different features to get it to appear. Champion select is laggy and does not feel smooth at all, specially when I'm changing my Runes.
The client may look better than the old one, but I would honestly prefer a simplified version of what we have now. Dial down on the visual effects, animations, animated transitions, the amount of effects we have in champion select and so on.