While I agree with you that the CX-5 (Signature & GTR) is in the conversation with X1, GLA and Q3, I think that theI think in here Europe, the CX-30 will target the Nissan Quashqai, Opel Grandland, Renault Kadjar and the like.
The X1, GLA and Q3 are in a different segment and a bit more expensive and more on price with the CX-5.
Q3 hatchback would compete with a turbo CX-30 or possibly Skyactive-X engine. Without those 2 options (in the states at least) I think that
Mazda is missing out.