Games are still way too one sided.

Yes, bounties are huge right now, but that is the only comeback mechanic in the game right now. There are many snowball mechanics which include: turret plating, elemental drakes (particularly mountain and infernal), rift herald, baron, and elder drake. Many one sided games end up with the behind team stuck in their base fending off supers while the ahead team can grab the entire jungle and every drake, and have a much easier time getting vision around baron. Even if the losing team somehow stalls to late game, the ahead team will still have a late game advantage because of elemental drakes since if they ever get elder, they will be much stronger even if both teams are at full build. This is magnified if there are infernal drakes, which means the behind team will have no hope of ever winning a 5v5 teamfight. If the losing team somehow gets elder, it won't do much as the buff will be very weak. My games have been getting longer, but that is just because the ahead team is too afraid of giving huge shutdowns.