We still have that problem and make it worse, same project getting multiple grant, some got in Million, with very little impact. Few projects are also misusing grant token.
But grant process is more transparent now, dedicated team to review them, scope is wider, including audit support.

Idea of intent to tackle bigger issue. 
https://warpcast.com/weboftrust/0x3f8acc19

Citizen house is getting bigger. 

Feedback from past RPGF was included in upcoming season. 

Law of chain https://gov.optimism.io/t/law-of-chains-v0-1-full-draft/6514?u=opuser

and recently announced selection of security council.

Searchcaster