I think it's Okay to go with as I noticed many are practising same from our industry. And I feel like "brand & keyword" is not going to hurt; if so it must be hurting all the pages of website being with same suffix across all page titles. I think Topic name is going to play key role which we possibly do not have duplicate content issues. Our new sub directory is a help guide and I am planning to add "help" and choose one of the below format.
Topic | help - vertigo tile
Topic | vertigo tiles help
Topic | vertigo tiles - help