The game isn't "harder" per say, it's just more catered to people of lower skill levels due to the runes and RNG elements within the game.
As for my opinion on the current state of the game.....Awful. The rune changes have brought more problems than they have fixed, and as a result we will likely get a system that is unbalance-able. Another thing to note is that there are far too many "cancer" champions than ever before, and honestly these champs feel borderline impossible to play against unless you contest them with an equally broken champ. Somehow, Riot has made the game punish you for one tricking your favourite character if they're not meta....
Furthermore, games are far too short and due to this it feels like I'm trapped in most of my games for 15-20 minutes since the moment any lane loses the game is usually over, especially if it's bot lane.
Additionally, it doesn't help when my favourite 2 champs Kat and Rengar just aren't fun to me anymore due to Riot's forced update to appeal to angry ADC redditors. Who knows about this though, since Rengar is getting his old Q back, maybe I'll find it fun again.