Gambit is still a top 3 hero.
Gambit has been played or banned in every EMEA and every NA Ignite match since his release, without exception. He is still picked or banned in 90% of games Cel+, probably a similar number in GM. This hero is still extremely good. The fact that he now has a semblance of competition for "best support in the game" in the form of Rocket and Luna (often Mantis as well) doesn't mean he's weak, or needs buffs, or that he's been over-nerfed. Please understand that the issues you may be experiencing with this character as an OG Gambit player are not a sign that he is bad. You cannot honestly make an argument that he is not (at least) a top 3 support in absolutely any comp. In other words, he is better than nearly the entire support roster in every single situation, and is within inches of the other two. Gambit is still good, he's only now beginning to reach a point where he's balanced as opposed to being the pick/ban hero he was previously, since release. The fact that it is SOMETIMES better to play another hero doesn't mean he's bad or weak, and it definitely doesn't mean he needs buffs. If you find yourself wishing for buffs, please remember that Gambit is still better than 90% of the support roster, and at least 90% of the entire roster in general. It's been a fun 8 months of uncontested absolute domination, but it's finally time to accept that other heros deserve their time in the spotlight.