It can be observed that Riot Games’ strong buffs to marksmen since patch 10.11 have positively impacted the position of marksmen in the current meta. The clearest evidence is the ban rate in the summer season across all professional tournaments as of June 16:

With statistics compiled by LoLEsports Stats from all professional tournaments, we can confirm that Varus is not only strong in a single area but stands firm at the top of the League of Legends meta globally. The 10% damage reduction in patch 10.12 is deemed insufficient for Varus to retreat from the ranks of top meta champions.
Furthermore, the strong buffs to numerous marksmen, combined with the build style of Death Dance, have led to the emergence of several other marksmen in the top 10 bans, such as Graves, Ezreal, Aphelios, and Kalista. Therefore, at this moment, if we discuss the ability to determine match outcomes, the bot lane is indeed the area with the highest influence.

Finally, entering the top 10 bans are two top lane champions with tanky and initiation tendencies: Sett and Ornn, rather than powerful split-pushing fighters. This indicates that to increase the chances of winning in the current meta, if not playing a marksman, players should also focus on allocating resources to support their team’s bot lane.