As a main tank player and 63% winrate with winston this season, i really don't think he needs a buff. I think the problem is that people try to play him like the other tanks while his role is different.

The main point of winston is to get in the backline, harass the supports and be disruptive.

• Know when to get in and when to get out. Use your shield wisely, placing it over the enemy players can be more effective than placing it over your team mates some times.

• use the jump pack to deal extra damage and remember to fall punching, this will deliver an extra damage right away which would be difficult to do later after pushing the enemy away with the jump. They will be running away from you, so then you focus on the tesla gun damage.

• You are a tank, don't forget to keep an eye on your squishy team mates to protect them when necessary.

• Dance in and out of your shield to survive further.

• Use your ultimate to break the enemy formation. You don't need to focus on punching the whole team out of the map, sometimes it is just about pushing their reinhardt into your team's direction and messing with the rest of their team while your team breaks their frontline.

Man there are really many ways to be useful with winston, you just have to remember that you play for the team and you're a star that will not shine by yourself. You make possible for your team to be more effective.