Definition of thesis from the Collins English Dictionary The noun phrase A noun phrase is a word or group of words that can function as the subject, the object, or the complement in a sentence.
Sona, Ziggs, and Heimer are all still there on the top (well above 60% win rate) along with most of the champions that were there prior to the mark/dash .. Bard, Evelyn, and Elise are all still on the bottom (below 40% win rate) along with most of the champions that were there prior the mark/dash.
Riot games in constantly looking to improve the balance of the game. Naturally there will be some champions that do better in particular patches than other. You can check out what champions have the highest win rates at any time here: Charts & Statistics - League of Legends. You can narrow the results by region, map, time and rank. For example: over the last week in North America in Bronze ranked solo queue, Amumu has the highest win rate. That being said, don't just pick whatever champion is highest.